Latest DSSSB PGT Chemistry Exam Question (Objective Questions), MCQ in English
Subjects : General Awareness, Hindi Language & Comprehension, General Intelligence & Reasoning, Arithmetic & Numerical Ability, Chemistry and teaching methodology
Kurukshetra a journal on rural development is published by
A
Ministry of Finance
B
Ministry of Information and Broadcastin
C
Ministry of Rural Development
D
Planning Commission
Question 3Single Answer
Devaluation of a currency means
A
Fixing the value of the currency in conjuction with the movement in the value of a basket of predetermined currencies
B
Reduction in the value of a currency vis-à-vis major internationally traded currencies
C
Fixing the value of currency in multilateral consultaion with the IMF the World Bank and major trading partners
D
Permitting the currency to seek its worth in the international market
Question 4Single Answer
In India rural incomes are generally lower than the urban incomes, which of the following reasons account for this
1. a large number of farmers are illiterate and know little about scientific agriculture
2. prices of primary products are lower than those of manufactured products
3. Investments in agriculture has been low when compared to investment in industry
A
1 and 3
B
2 and 3
C
1 and 2
D
1,2 and 3
Question 5Single Answer
Which of the following programmes aims at the promotion of savings among rural women
A
Rashtriya Mahila Kosh
B
Indira Mahila Yojna
C
Jawahar Rozgar Yojna
D
Mahila Samridhi Yojna
Question 6Single Answer
In ruby laser, the stimulated emission is due to transition from
A
metastable state to any lower state
B
any higher state of lower state
C
metastable state to ground state
D
any higher state to ground state
Question 7Single Answer
A direct current I flows along the length of an infinitely long straight thin walled pipe, then the magnetic field is
A
uniform throughout the pipe not zero
B
zero only along the axis of the pipe
C
zero at any point inside the pipe
D
maximum at the centre and minimum at the edge
Question 8Single Answer
convex lens made of glass has focal length 0.15m in air. If the refractive index of glass is 3/2, and that of water is 4/3 the focal length of lens when immersed in water is
A
0.45 m
B
0.15 m
C
0.30 m
D
0.6 m
Question 9Single Answer
The respiratory quotient during cellular respiration would depend on
A
the nature of enzymes involved
B
the nature of the substrate
C
the amount of carbon dioxide released
D
the amount of oxygen utilised
Question 10Single Answer
Which of the following is not a green - house gas ?
A
Water vapour
B
Carbon monoxide
C
Methane
D
Oxygen
Question 11Single Answer
Which Delhi Sultan captured Qutub Minar while it was under construction?
A
Iltutmish
B
Alauddin Khalji
C
Qutub-ud-din Aibak
D
Muhammad Tughlaq
Question 12Single Answer
Where did the First Battle of Panipat take place?
A
Panipat
B
Delhi
C
Kurukshetra
D
Agra
Question 13Single Answer
Who built the Jama Masjid of Delhi?
A
Shah Jahan
B
Jahangir
C
Akbar
D
Aurangzeb
Question 14Single Answer
The iconic Humayun's Tomb was built by:
A
Babur
B
Humayun
C
Hamida Banu Begum
D
Akbar
Question 15Single Answer
The Iron Pillar near Qutub Minar was originally from:
A
Kanauj
B
Mathura
C
Ujjain
D
Pataliputra
Question 16Single Answer
On what date did India celebrate the 9th anniversary of the Goods and Services Tax (GST) implementation?
A
July 1, 2026
B
June 30, 2026
C
July 2, 2026
D
June 29, 2026
Question 17Single Answer
Which global event is India participating in with Sweden as a partner?
A
Venus Orbiter Mission 'Shukrayaan'
B
Chandrayaan-4
C
Gaganyaan crewed mission
D
Mars Orbiter Mission-2
Question 18Single Answer
Who became India's 97th Chess Grandmaster in late June 2026?
A
Gukesh D
B
Praggnanandhaa R
C
Harshavardhan G.B.
D
Arjun Erigaisi
Question 19Single Answer
What major merger was approved by the boards of PFC and REC Limited on June 30, 2026?
A
Merger with SBI
B
Merger into a single power financing entity
C
Merger with NTPC
D
Merger with IREDA
Question 20Single Answer
Which initiative was launched at the Rashtriya Gramin Vikas Sammelan 2026 for rural women SHGs?
A
Lakhpati Didi App
B
Digital India Rural Scheme
C
PM Kisan Drone Yojana
D
SARAS Shakti Collection and Coffee Table Book
Hindi Language & Comprehension
Question 21Single Answer
शुद्ध वर्तनी का चयन कीजिए
A
अधम्र
B
अध्रम
C
अधर्म
D
अध्रिम
Question 22Single Answer
शुद्ध वर्तनी का चयन कीजिए
A
स्थायि
B
स्थायी
C
स्थाई
D
स्थाइ
Question 23Single Answer
वर्तनी की दृष्टि से सही शब्द है?
A
महत्व
B
महतव
C
महत्तव
D
महतत्व
Question 24Single Answer
निम्नलिखित में से शुद्ध छांटिए?
A
आयुष्मान
B
आयुश्मान
C
आयुशमान
D
आयुश्यमान
Question 25Single Answer
शुद्ध शब्द नहीं हैं?
A
कवियत्री
B
कौसल्या
C
एश्वर्य
D
श्रृंगार
Question 26Single Answer
शुद्ध वर्तनी है -
A
पूज
B
पुजय
C
पूज्य
D
पुज्य
Question 27Single Answer
शुद्ध वर्तनी है -
A
अनुसरण
B
अनूशरणन
C
अनुशरण
D
अणुशर
Question 28Single Answer
किस क्रमांक में सभी शुद्ध हैं?
A
एक्य,साप्ताहिक
B
आजीविका,आशीर्वाद
C
आर्शिवाद ,अनूकूल
D
निरिक्षण ,कृपालु
Question 29Single Answer
'उज्वल' शब्द का शुद्ध रूप है ?
A
उज्जव
B
उज्ज्ल
C
उज्ज्वल
D
उजवल
Question 30Single Answer
निम्नलिखित प्रश्न में चार वैकल्पिक वर्तनियाॅ दी गई है?
A
जागृत
B
जाग्रति
C
जाग्रित
D
जाग्रत
Question 31Single Answer
निम्नलिखित प्रश्न में चार वैकल्पिक वर्तनियाॅ दी गई है?
A
उन्नति
B
उनति
C
उन्ती
D
उनती
Question 32Single Answer
निम्नलिखित प्रश्न मे चार वैकल्पिक वर्तनियाॅ दी गई है?
A
अनुशहरण
B
अनोसरण
C
अनुसरन
D
अनुसरण
Question 33Single Answer
'पृथ्वीराज रासो' किस काल की रचना है ?
A
आदिकाल
B
रीतिकाल
C
भक्तिकाल
D
आधुनिक काल
Question 34Single Answer
हिन्दी की उत्पत्ति किस भाषा से हुई है?
A
प्राकृत
B
संस्कृत
C
शौरसैनी अपभ्रंश
D
मागधी
Question 35Single Answer
राजभाषा आयोग के प्रथम अध्यक्ष थे ?
A
बी. जी. खरे
B
राजा लक्ष्मण सिंह
C
प्रताप नारायण मिश्र
D
इंशाअल्ला खा
Question 36Single Answer
निम्नलिखित बोलियों में से कौन - सी बोली उत्तर प्रदेश में नहीं बाली जाती?
A
मैथिली
B
अवधी
C
ब्रज
D
खड़ी बोली
Question 37Single Answer
भारत की प्रथम देशज भाषा कौन-सी है?
A
पालि
B
प्राकृत
C
संस्कृत
D
इसमें से कोई नहीं
Question 38Single Answer
भारतेन्दु ने किस पत्रिका का संपादन किया?
A
हिन्दी प्रदीप
B
इन्दु
C
कविवचन सुधा
D
भारतबन्धु
Question 39Single Answer
पूर्वी हिन्दी विकसित हुई है?
A
पैशाची अपभ्रंश
B
अर्धमागधी अपभ्रंश
C
शौरसैनी अपभ्रंश
D
मागधी अपभ्रंश
Question 40Single Answer
मानक हिन्दी का आधार क्या है?
A
खड़ी बोली
B
अपभ्रंश
C
पूर्वी हिन्दी
D
परिनिष्ठ हिन्दी
General Intelligence & Reasoning
Question 41Single Answer
How many such pairs of letters are there in the word ‘CLEANLINESS’ each of the which has as many letters between them in the word as they have in the English alphabet, in the same sequence?
A
Two
B
Three
C
Five
D
Four
E
None of these
Question 42Single Answer
Team A has scored more goals than Team B
Team C has scored fewer goals than Team B
Team A has scored fewer goals than Team C .
If the first two statements are true, the third statement is
A
True
B
False
C
Uncertain
D
None
Question 43Single Answer
If it is possible to make only one meaningful word with the second, the third, the sixth and the eight letters of the word FRAGMENT using each only once, which of the following will be the third letter of that word ? If no such word can be formed, give ‘X’ as the answer and if more than one such word can be formed, give ‘Y’ as the answer.
A
A
B
E
C
T
D
X
E
Y
Question 44Single Answer
How many such letters are there in the word ORIENTAL each of which is as far away from the beginning of the word as when they are arranged alphabetically?
A
None
B
One
C
Two
D
Three
E
More than three
Question 45Single Answer
How many such pairs of letters in the word CREDIT each of which has as many letters between them in the word as in the English alphabet?
A
None
B
One
C
Two
D
Three
E
More than three
Question 46Single Answer
How many meaningful words can be made from the letters ‘LMEA’ using each letter only once in each word?
A
None
B
One
C
Two
D
Three
E
More than three
Question 47Single Answer
If it is possible to make only one meaningful word with the first, the second, the seventh and the eighth letters of the word TEMPORAL, which of the following will be the first letter of that word? If more than one such word can be made, give ‘Y’ as the answer and if no such word can be made, give ‘X’ as the answer.
A
T
B
L
C
E
D
Y
E
X
Question 48Single Answer
If the letters of the word HANDOVER are arranged alphabetically from left to right how many letters will remain at the same position?
A
None
B
One
C
Two
D
Three
E
More than three
Question 49Single Answer
How many such pairs of letters are there in the word EXCURSION, each of which has as many letters between them in the word as they have in the English alphabet?
A
None
B
One
C
Two
D
Three
E
More than three
Question 50Single Answer
If it is possible to make only one meaningful word with the first, the second, the third, the sixth and the eighth letters of the word DEVIATION first letter of that word is your answer? If more than one such word can be made formed your answer is ‘A’ and if no such word can be formed your answer is ‘B’.
A
V
B
T
C
E
D
A
E
B
Important Questions Package
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General Intelligence & Reasoning
Question 51Single Answer
If each alternate letter beginning with the first in the word WORKING is replaced by the next letter in the English alphabet and each of the remaining letters is replaced by the previous letter in the English alphabet, which of the following will be the fourth from the right and after the replacement ?
A
N
B
Q
C
J
D
M
E
None of these
Question 52Single Answer
How many pairs of letters are there in the word ‘SHIFTED’ each of which has as many letters between its two letters as there are between in the English alphabet?
A
None
B
One
C
Two
D
Three
E
None of these
Question 53Single Answer
Statement: Is common currency a necessary ingredient for Europe’s growth ?
Arguments :
I. Yes, A common currency will enable entire Europe to market itself as one .
II. No, Similar experiments by Latin America countries have not affected their economies .
A
The only argument I is strong
B
Only argument II is strong
C
Either I or II is strong
D
Neither I nor II is strong
Question 54Single Answer
If it is possible to make only one meaningful word with the first, the fifth, the sixth, the tenth and the eleventh letters of the word EXCEPTIONAL using each letter only once, first letter of that word is your answer. If no such word can be made formed your answer is ‘X’ and if more than one such word can be formed your answer is ‘Y’.
A
P
B
L
C
T
D
X
E
Y
Question 55Single Answer
How many meaningful English words can be formed with the letters RAE using each letter only once in each word?
A
None
B
One
C
Two
D
Three
E
More than three
Question 56Single Answer
How many such pairs of letters are there in the word WONDERS, each of which has as many letters between its two letters as there are between them in the English alphabet?
A
One
B
Two
C
Three
D
Four
E
More than four
Question 57Single Answer
If it is possible to make only one meaningful English word from the second, the fifth, the seventh and the eighth letters of the word PHYSICAL, using each letter only once, second letter of that word is your answer. If more than one such word can be formed your answer is M. if no such word can be formed your answer is N.
A
I
B
A
C
L
D
M
E
N
Question 58Single Answer
How many such pairs of letters are there in the word JUSTIFY, each of which have as many letters between them in the word as they have between them in the English alphabet?
A
None
B
One
C
Two
D
Three
E
More than three
Question 59Single Answer
If the alphabets are assigned values as A=3, D=6, G=8, I=2, L=4 and T=5 then what is the sum of values of all the alphabets in the word DIGITAL?
A
26
B
28
C
30
D
32
E
None of these
Question 60Single Answer
How many such pairs of letters are there in the word EDUCATION, each of which has as many letters between them in the word as they have in the English alphabet?
A
None
B
One
C
Two
D
Three
E
More than three
Arithmetic & Numerical Ability
Question 61Single Answer
The cash difference between the selling prices of an article at a profit of 4% and 6% is Rs. 3. The ratio of the two selling prices is:__________ ?
A
51:52
B
52:53
C
51:53
D
52:55
Question 62Single Answer
Which of the following numbers is irrational ?
A
√49
B
0.125
C
√2
D
22/7
Question 63Single Answer
356 x 936 – 356 x 836 = ?
A
35600
B
34500
C
9630
D
93600
Question 64Single Answer
Arrange in descending order: 5/8, 7/10, 3/4
A
3/4 > 7/10 > 5/8
B
7/10 > 3/4 > 5/8
C
3/4 > 5/8 > 7/10
D
5/8 > 7/10 > 3/4
Question 65Single Answer
What is (3^{4} times 9^{2}) ?
A
36
B
38
C
310
D
96
Question 66Single Answer
If 34X-2 = 729, then find the value of X.
A
4
B
3
C
2
D
5
Question 67Single Answer
Convert 0.6 into fraction ?
A
3/5
B
2/3
C
4/5
Question 68Single Answer
The no. plate of a bus had peculiarity. The bus number was a perfect square. It was also a perfect square when the plate numbers were reversed. The bus company had only five hundred buses numbered from 1 to 500. What was the number ?
A
169
B
36
C
196
D
Can not say
Question 69Single Answer
If a and b are positive integers, such that ab = 125, then (a-b)a+b-4 = ?
A
16
B
25
C
28
D
30
Question 70Single Answer
If x*y = x2 + y2 – xy, then value of 9*11 is
A
93
B
103
C
60.5
D
121
Question 71Single Answer
Which is greater ?
A
15/16
B
17/18
C
Equal
D
Cannot compare
Question 72Single Answer
If sum of two numbers is 42 and their product is 437, then find their difference.
A
3
B
4
C
5
D
7
Question 73Single Answer
Write the 44000 in Roman numerals
A
XLI
B
XLVI
C
XLIV
D
XLVIC
Question 74Single Answer
Convert 0.0909… into fraction ?
A
1/11
B
9/11
C
1/9
D
9/10
Question 75Single Answer
What is (98 times 102) ?
A
9996
B
10000
C
10096
D
10196
Question 76Single Answer
Which is smaller ?
A
9/11
B
7/9
C
Equal
D
Cannot compare
Question 77Single Answer
Convert 0.5777… into fraction ?
A
26/45
B
52/90
C
13/22
D
5/9
Question 78Single Answer
Convert 0.81 into fraction ?
A
81/100
B
9/10
C
8/9
D
9/11
Question 79Single Answer
(63)2 – (12)2 =?
A
3528
B
3852
C
3582
D
3825
Question 80Single Answer
Which is greater ?
A
13/17
B
11/14
C
Equal
D
Cannot compare
Chemistry and teaching methodology
Question 81Single Answer
10-6 M NaOH is diluted 100 times. The pH of the diluted base is
A
between 7 and 8
B
between 5 and 6
C
between 6 and 7
D
between 10 and 11
Question 82Single Answer
In the electrolysis of acidulated water, it is desired to obtain 1.12 cc of hydrogen per second under STP condition. The current to be passed is
A
1.93 A
B
9.65 A
C
19.3 A
D
0.965 A
Question 83Single Answer
The one which decreases with dilution is
A
molar conductance
B
conductance
C
specific conductance
D
equivalent conductance
Question 84Single Answer
Vapour pressure of pure ‘A’ is 70 mm of Hg at 25oC. It forms an ideal solution with ‘B’ in which mole fraction of A is 0.8. if the vapour pressure of the solution is 84 mm of Hg at 25oC, the vapour pressure of pure ‘B’ at 25oC is
A
28 mm
B
56 mm
C
70 mm
D
140 mm
Question 85Single Answer
A 6% solution of urea is isotonic with
A
1 M solution of glucose
B
0.05 M solution of glucose
C
6% solution of glucose
D
25% solution of glucose
Question 86Single Answer
In countries nearer to polar region, the roads are sprinkled with CaCl2. This is
A
to minimise the wear and tear of the roads
B
to minimise the snow fall
C
to minimise pollution
D
to minimise the accumulation of dust on the road
Question 87Single Answer
A compound of ‘A’ and ‘B’ crystallises in a cubic lattice in which ‘A’ atoms occupy the lattice points at the corners of the cube. The ‘B’ atoms occupy the centre of each face of the cube. The probable empirical formula of the compound is
A
AB2
B
A2B
C
AB
D
AB3
Question 88Single Answer
In electrophilic aromatic substitution reaction, the nitro group is meta directing because it
A
decreases electron density at ortho and para positions
B
decreases electron density at meta position
C
increases electron density at meta position
D
increases electron density at ortho and para position
Question 89Single Answer
The best method for the conversion of an alcohol into an alkyl chloride is by treating the alcohol with
A
PCI5
B
PCI3
C
SOCl2 in presence of pyridine
D
dry HCl in the presence of anhydrous ZnCl2
Question 90Single Answer
The carbon bond length in benzene is
A
in between C2H6 and C2H4
B
same as in C2H4
C
in between C2H6 and C2H2
D
in between C2H4 and C2H2
Question 91Single Answer
The compound which is not formed during the dry distillation of a mixture of calcium formate and calcium acetate is
A
methanal
B
propanal
C
propanone
D
ethanal
Question 92Single Answer
An organic compound x is oxidised by using acidified K2Cr2O7. The product obtained reacts with phenyl hydrazine but does not answer silver mirror test. The possible structured of X is
A
CH3CH2OH
B
CH3 – C – CH3
C
(CH3)2CHOH
D
CH3CHO
Question 93Single Answer
Arrange the following in the increasing of their. Basic strengths CH3NH2, (CH3)2NH, (CH3)2N, NH3
A
NH3, < (CH3)3N < (CH3)2NH < CH3NH2
B
NH3 < (CH3)3N < CH3NH2 < (CH3)2NH
C
(CH3)3N < NH3 < CH3NH2 < (CH3)2NH
D
CH3NH2 < (CH3)2NH < (CH3)3N , NH3
Question 94Single Answer
The one which has least iodine value is
A
sunflower oil
B
ginger oil
C
ghee
D
groundnut oil
Question 95Single Answer
A diabetic person carries a packet of glucose with him always, because
A
glucose reduces the blood sugar level slowly
B
glucose increases the blood sugar level slowly
C
glucose reduces the blood sugar level
D
glucose increases the blood sugar level almost instantaneously
Question 96Single Answer
There are 20 naturally occurring among acids. The maximum number of tripeptides than can be obtained is
A
8000
B
6470
C
7465
D
5360
Question 97Single Answer
At what temperature ill the RMS velocity of SO2 be the same as that of O2 at 303 K ?
A
403 K
B
303 K
C
606 K
D
273 K
Question 98Single Answer
Phenol is treated with bromine water and shaken well. The white precipitate formed during the process is
A
m–bromophenol
B
2, 4, 6 tribromophenol
C
2-4 dibromophenol
D
A mixture of o-and p-bromophenols
Question 99Single Answer
In thermite process the metal used as reducing agent is:
A
Nickel
B
Zinc
C
Sodium
D
Aluminium
Question 100Single Answer
Which of the following compounds on boiling with alkaline KMnO4 and subsequent acidification will not give benzoic acid?
A
Benzyl alcohol
B
Acetophenone
C
Anisole
D
Toluene
Question 101Single Answer
Which of the following is not a synthetic fibre:
A
Anygora
B
Rayon
C
Nylon
D
Polyster
Question 102Single Answer
Which one of the following is not contained in Portland cement ?
A
Ca3Al2O6
B
Ca3SiO5
C
Ca2SiO4
D
Ca3(PO4)2
Question 103Single Answer
What is the reson for white cement to be white ?
A
It does not contain carbon
B
It does not contain silicon
C
It does not contain iron
D
It does not contain calcium
Question 104Single Answer
Which fertilizer is assimilated directly by the plant ?
A
Super phosphate
B
Nitrolim
C
Muriate of Potash
D
Humus
Question 105Single Answer
Which of the following chemicals is used in foam fire extinguishers ?
A
Aluminium sulphate
B
Copper sulphate
C
Cobalt sulphate
D
Nickel sulphate
Question 106Single Answer
What is a mixture of potassium nitrate, powdered charcoal and sulphur called ?
A
Glass
B
Cement
C
paint
D
Gun powder
Question 107Single Answer
Which one of the following chemicals is used in beauty parlours for hair – setting ?
A
Sulphur based
B
Phosphorus based
C
Silicon based
D
Iron based
Question 108Single Answer
Which one of the following is used as a mordant in dyeing and tanning industry ?
A
Magnesium oxide
B
Magnesium carbonate
C
Magnesium chloride
D
Magnesium sulphate
Question 109Single Answer
Which one of the following substances is used in the manufacture of safety matches ?
A
Red phosphorus
B
White phosphorus
C
Phosphorus trioxide (P2O3)
D
Black phosphorus
Question 110Single Answer
Which one of the following polymeric materials is used for making bullet proof jacket ?
A
Nylon –6, 6
B
Rayon
C
Kevlar
D
Dacron
Question 111Single Answer
Which one of the following is another name of RDX
A
Cyanohydrin
B
Dextran
C
Cyclohexane
D
Cyclonite
Question 112Single Answer
Which one of the following is used as an explosive ?
A
Phosphorus trichloride
B
Mercuric oxide
C
Graphite
D
Nitroglycerine
Question 113Single Answer
Flint glass is obtained from which of the following ?
A
Zinc and barium borosilicate
B
Sand, red lead and potassium carbonate
C
Sodium aluminium borosilicate
D
Pure silica and zinc oxide
Question 114Single Answer
Which one of the following correctly defines the state of glass ?
A
Crystalline solid
B
Super cooled liquid
C
Condensed gas
D
Liquid crystal
Question 115Single Answer
Which one of the following is not used as fertilizer ?
A
Ammonium nitrate
B
Ammonium sulphide
C
Ammonium phosphate
D
Ammonium sulphate
Question 116Single Answer
Which one of the following elements is needed in the human body to transfer electrical signals by nerve cells ?
A
Lithium
B
Sodium
C
Rubidium
D
Caesium
Question 117Single Answer
Which one of the following is NOT true for bleaching powder ?
A
It is used as a reducing agent in chemical industries
B
It is used for bleaching wood pup in paper factories
C
It is used for disinfecting drinking water
D
It is used for bleaching linen in textile industry
Question 118Single Answer
Hard glass having the same ingredientsas soft glass excepts.
A
hard glass have Na in place of K
B
hard glass having K in place of Na
C
hard glass having both Na and K
D
None of the above
Question 119Single Answer
A complete fertilizer provides
A
N,P, K
B
S, K, N
C
S, B, K
D
N, S, P
Question 120Single Answer
Antacids are commonly used to get rid of acidity in the Stomach. A commonly used antacid is.
A
sodium hydrogen phthalate
B
magnesium hydroxide
C
calcium hydroxide
D
manganese acetate
Question 121Single Answer
Annealing of glass is done to.
A
make it brittle
B
make it opaque
C
make it transparent
D
None of the above
Question 122Single Answer
Petrochemicals are obtained from.
A
coal
B
petroleum
C
coal tar
D
All of these
Question 123Single Answer
The use of chemicals for treatment of diseases is called as.
A
isothermotherapy
B
angiotherapy
C
physiotherapy
D
chemotherapy
Question 124Single Answer
Which of the following is a hypnotic drug ?
A
luminal
B
salol
C
catechol
D
chemisol
Question 125Single Answer
Teflon is a polymer of which of the following monomers ?
A
Tetrafluoroethylene
B
Vinyl chloride
C
Acetylene dichloride
D
None of the above/More than one of the above
Question 126Single Answer
LPG used as domestic fuel chiefly contains–
A
Methane
B
Propane
C
Ethylene
D
Butane
E
None of the above/More than one of the above
Question 127Single Answer
Glass is a.
A
liquid
B
colloid
C
non–crystalline amorphous solid
D
crystalline solid
Question 128Single Answer
Which one of the following acids is used for etching glass ?
A
H2SO4
B
HNO3
C
HF
D
HCI
Question 129Single Answer
What is the purpose of adding plasticizers in paint manufacturing process ?
A
They act as a film–forming constituent
B
They reduce the viscosity
C
They prevent the polymerization and condensation
D
They provide elasticity to the film and minimize its cracking
Question 130Single Answer
Which raw material is used in the preperation of soft glass ?
A
K2CO3, SiO2, CaCO3
B
K2CO3, SiO2, PbCO3
C
Na2CO3, SiO2, CaCO3
D
Na2CO3, SiO2, PbO
Question 131Single Answer
What is the composition of nitrolim – a chemical fertilizer ?
A
Nitrogen and limestone
B
Calcium carbide and nitrogen
C
Calcium carbide and carbon
D
None of above
Question 132Single Answer
the major component used in preparation of different type of glasses is.
A
Silica
B
Sodium borate
C
Calcium silicate
D
Sodium silicate
Question 133Single Answer
Salts of which of the following elements provide colours to fireworks ?
A
Zinc and sulphur
B
Potassium and mercury
C
Strontium and barium
D
Chromium and nickel
Question 134Single Answer
Given below are two statements :
Statement I : Phenyl is used as a household germicide.
Statement II : Phenyl is phenol derivative and phenol is an effective germicide.
In the light of the above statement, choose the correct answer from the options given below:
A
Both Statement I and II are correct and Statement II is the correct explanation of Statement I
B
Both Statement I and Statement II are true but Statement II is NOT the correct explanation of Statement I
C
Statement I is correct, but Statement II is incorrect
D
Statement I is incorrect, but Statement II is correct
Question 135Single Answer
Given below are two statements :
Statement I : Coal–based thermal power stations contribute to acid–rain.
Statement II : Oxides of carbon are emitted when coal burns.
In the light of the above statement, choose the correct answer from the options given below:
A
Both Statement I and II are individually correct and Statement II is the correct explanation of Statement I
B
Both Statement I and Statement II are individiaully correct but Statement II is not the correct explanation of Statement I
C
Statement I is correct, but Statement II is incorrect
D
Statement I is incorrect, but Statement II is correct
Question 136Single Answer
Terfenadine is commonly used as a/an.
A
transquilizer
B
antihistamine
C
antimicrobial
D
antibiotic
Question 137Single Answer
Which one of the following is not a tranqualizer ?
A
Equanil
B
Veronal
C
Salvarsan
D
Serotonin
Question 138Single Answer
Barbituric acid and its derivatives are well known.
A
antipyretics
B
analgesics
C
antiseptics
D
tranquilizers
Question 139Single Answer
Which one among is not an analgesic ?
A
Ibuprofen
B
Naproxen
C
Aspirin
D
Valium
Question 140Single Answer
Various phenol derivatives, tincture of iodine (2 – 3%) I 2 in (water/alcohol) and some dyes like methylene blue are.
A
antiseptics
B
disinfectants
C
analgesics
D
antipyretics
Question 141Single Answer
Commonly used antiseptics 'Dettol' is a mixture of.
A
o–chlorophenozylenol + terpeneol
B
o–cresol + terpeneol
C
phenol + terpeneol
D
chloroxylenol + terpeneol
Question 142Single Answer
Which of the following is not an antiseptic drug ?
A
Iodoform
B
Dettol
C
Gammexene
D
Genatian violet
Question 143Single Answer
Which one of the following substances is made from natural raw materials ?
A
Rayon
B
Nylon
C
Polyster
D
Polystyrene
Question 144Single Answer
The polymeric fibre used as a substitute for wool in making synthetic blankets, sweaters, etc. is.
A
nylon
B
teflon
C
orlon
D
bakelite
Question 145Single Answer
The cleaning of dirty clothes by soaps and detergents is deue to a type of molecules called surfactants, which are present in soaps and detergents. The surfactant molecules remove the dirt by.
A
making the cloth slippery
B
producing some gases between the dirt and the cloth
C
dissolving the dirt
D
forming some aggregates of themselves and take away the dirt in the core of the aggregates
Question 146Single Answer
Contact lenses are made from.
A
polyvinyl chloride
B
polystyrene
C
lucite
D
teflon
Question 147Single Answer
On of the occupational health hazards commonly faced by workers of ceramics, pottery and glass industry is.
A
stone formation in gall bladder
B
melanoma
C
silicosis
D
stone formation in kidney
Question 148Single Answer
vermicompost is an/a.
A
inorganic fertilizer
B
toxic substance
C
organic bio fertilizer
D
synthetic fertilizer
Question 149Single Answer
The macro nutrients provided by inorganic fertilizer are.
A
carbon, iron and boron
B
magnesium, manganese and sulphur
C
magnesiu, zinc and iron
D
nitrogen, phosphorus and potassium
Question 150Single Answer
Which one of the following statement is not correct ?
A
Water starts boiling when its vapour pressure becomes equal to amospheric pressure
B
Water is known as universal solvent
C
Permanent hardness of water is due to presence of MgCl2, CaCl2, MgSO4 and CaSO4
D
Density of ice is greater than that of water
Question 151Single Answer
Density of the following polymers is used for making bullet proof windows ?
A
Polycarbonates
B
Polyerethanes
C
Polystyrene
D
Polyamides
Question 152Single Answer
Match the List – I with List – II
List - I List - II
(Substances) (Applications)
A. Aspartame 1. Syunthetic rubber
B. Freon 2. Anti – histamine
C. Neoprene 3. Artificial Sweetener
D. Benadryl 4. Refrigerant
Select correct answer using the codes given below :
A
A B C D
1 3 4 2
B
2 4 1 3
C
3 4 1 2
D
3 1 2 4
Question 153Single Answer
Match the List – I with List – II
List - I List - II
(Noble gas) (Use)
A. Argon 1. In lights for advertising display
B. Neon 2. Airport landing lights and in light houses
C. Krypton 3. Light in photographer's flash gun
D. Xenon 4. In tungsten filament to last longer
Select correct answer using the codes given below :
A
A B C D
3 1 2 4
B
3 2 1 4
C
4 2 1 3
D
4 1 2 3
Question 154Single Answer
Which one is a sublime substance ?
A
Table salt
B
Sugar
C
Iodine
D
Potassium Iodide
Question 155Single Answer
The process of change of liquied state into gaseous state at constant temperature is known as.
A
boiling
B
melting
C
fusion
D
evaporation
Question 156Single Answer
Which one is a surface phenomenon ?
A
Evaporation
B
Boiling
C
Both (a) and (b)
D
None of these
Question 157Single Answer
Jayamkondam in Tamil Nadu is famous for which among the following minerals ?
A
Bauxite
B
Lignite
C
Calcite
D
Magnesite
Question 158Single Answer
Which of the following processes is known as fusion ?
A
change of liquid to solid
B
Change of solid to liquid
C
Change of liquid to vapour
D
Change of gaseous state to solid state
Question 159Single Answer
The one, in which interparticle forces are strongest, is.
A
sodium chloride
B
hydrogen
C
ether
D
carbon dioxide
Question 160Single Answer
Which of the following is compound ?
A
Stainless steel
B
Brass
C
Iron sulphide
D
Diamond
Question 161Single Answer
Which one of the following is non-crystalline or amorphous ?
A
Diamond
B
Graphite
C
Glass
D
Common Salt
Question 162Single Answer
The size of colloidal particles usually lies in the range.
A
10–5 – 10–7 cm
B
10–7 – 10–9 cm
C
10–3 – 10–5 cm
D
10–5 – 10–6 cm
Question 163Single Answer
Oil and water can form a stable dispersion with the help of a third substance commonly called.
A
emulsifier
B
dispersant
C
protective colloid
D
None of these
Question 164Single Answer
Why is helium preferred over hydrogen for use in airships.
A
Helium has a low density
B
Helium has a high density
C
Helium is chemically less reactive
D
Helium is chemically more reactive
Question 165Single Answer
Which one of the following mixture is homogeneous ?
A
Starch and sugar
B
Methanol and water
C
Graphite and charcoal
D
Calcium carbonate and calcium bicarbonate
Question 166Single Answer
A mixture of sulphur and carbon disulphide is.
A
heterogeneous and shows Tyndall effect
B
homogeneous and shows Tyndall effect
C
heterogeneous and does not show Tyndall effect
D
homogeneous and does not show Tyndall effect
Question 167Single Answer
A student, carefully observed the colloidal of starch in water, human blood and cow milk. On the basis of observations, he made certain conclusions given below. Choose the wrong conclusion about colloidal solution.
A
Translucent
B
Components can be separated by ordinary filteration
C
Heterogenous and stable
D
show tyndal effect
Question 168Single Answer
Choose the incorrect statement about true solution.
A
Its components can not be separated by filteration
B
It is opaque and unstable
C
Its particles can not be seen through naked eye
D
It does not show tyndal effect
Question 169Single Answer
Barium sulphate (BaSO4) dispersed in water used diagnostic X–rays is a.
A
Colloid
B
Solution
C
Suspension
D
Foam
Question 170Single Answer
Non–reacting gases have a tendency to mix with each other. This phenomenon is known as.
A
chemical reaction
B
diffusion
C
effusion
D
explosion
Question 171Single Answer
Alkali halids do not show Frenkel defect because
A
cations and anions have almost equal size
B
there is a large difference in size of cations and anions
C
cations and anions have low coordination number
D
anions cannot be accommodated in voids
Question 172Single Answer
In NaCl structure
A
all octahedral and tetrahedral sites are occupied
B
only octahedral sites are occupied
C
only tetrahedral sites are occupied
D
neither octahedral nor tetrahedral sites are occupied
Question 173Single Answer
A mixture of ZnCl2 and PbCl2 can be separated by.
A
distillation
B
crystallization
C
sublimation
D
adding acetic acid
Question 174Single Answer
Magnetism is most beneficial for separating.
A
gases and non–metallic liquids
B
magnetic solids and solids such as sulphur
C
non–metallic solids and solids such as sulphur
D
non–magnetic solids from non–magnetic liquids
Question 175Single Answer
Water is boiling is open fry pan represents which type of change ?
A
Physical and irreversible
B
Chemical and irreversible
C
Physical and reversible
D
Chemical and reversible
Question 176Single Answer
Chemical change is always accompanied by
(1) production of sound
(2) heat and light
(3) change in mass
(4) change in colour
A
1, 2 & 3
B
2 & 4
C
1 only
D
1, 2 & 4
Question 177Single Answer
Who among the following is called 'The father of modern chemistry" ?
A
Michael Faraday
B
Lavoisier
C
Proust
D
Linus Pauling
Question 178Single Answer
Which one among the following is not a mixture ?
A
Graphite
B
Glass
C
Brass
D
Steel
Question 179Single Answer
The latest discovered state of matter is.
A
Solid
B
Bose–Einstein condensation
C
Plasma
D
liquid
Question 180Single Answer
Which one of the following is not a mixture ?
A
Toothpaste
B
Toilet soap
C
Baking soda
D
Vinegar
Question 181Single Answer
Which one of the following is a heterogenous mixure ?
A
Hydrochloric acid
B
Vinegar
C
Milk
D
Soda water
Question 182Single Answer
Which one of the following is not a characteristic of a compound ?
A
Composition is variable
B
All particles of compounder are of only one type
C
Particle of compound have two or more elements
D
Its constituents cannot be separated by simple physical methods
Question 183Single Answer
The gas is commonly used in anaesthesia.
A
methane
B
nitrous oxide
C
nitrogen
D
hydrogen peroxide
Question 184Single Answer
The inert gas abundantly found in atmosphere is.
A
Xe
B
Kr
C
He
D
Ar
Question 185Single Answer
Which gas is used in filling electric bulbs ?
A
Neon
B
Argon
C
Radon
D
Krypton
Question 186Single Answer
Kerosoene is a mixture of.
A
aromatic hydrocarbons
B
aliphatic hydrocarbons
C
saturated hydrocarbons
D
alicyclic hydrocarbons
Question 187Single Answer
Candle contains a mixture of.
A
Bees wax and paraffin wax
B
Bees wax and stearic acid
C
Paraffin wax and stearic acid
D
Higher fatty acid
Question 188Single Answer
Which one of the following noble gases is not found in the atmosphere ?
A
Argon
B
krypton
C
Radon
D
Xenon
Question 189Single Answer
Which gas is responsible for the swelling of bread ?
A
oxygen
B
Carbon monoxide
C
Carbon dioxide
D
Ammonia
Question 190Single Answer
Which of the following is used as a preservative to protect processed food ?
A
Sodium sulphate
B
Saccharin
C
BHT
D
Sodium metabisulphite
Question 191Single Answer
Carborundum is a compound of.
A
Ca
B
Ge
C
Si
D
S
Question 192Single Answer
Which of the following could act as a propellant for rockets ?
A
Liquid oxygen + Liquid argon
B
Liquid hydrogen + Liquid oxygen
C
Liquid nitrogen + Liquid oxygen
D
Liquid hydrogen + Liquid nitrogen
Question 193Single Answer
Helium is preferred to hydrogen in air ballons because it.
A
is cheaper
B
is less dense
C
has greater lifting power
D
does not form an explosive mixture with air
Question 194Single Answer
The compound that has the least value for octane number is-
A
n–heptane
B
2–methyl heptane
C
Iso–octane
D
2, 2 – dimethyl hexane
Question 195Single Answer
Select the one that is not a matter.
A
feeling of hot
B
smoke
C
humidity
D
water
Question 196Single Answer
Which is incorrect statement ?
A
Matter is continuous in nature
B
Of the three state of matter, the one that is most compact is solid state
C
In solid state interparticles space (i.e. empty space) is minimum
D
The density of solid is generally more than that of a liquid
Question 197Single Answer
Select the one that when used would be considered as best condition for liquification of a gas.
A
Increasing the temperature
B
Decreasing the pressure
C
Increasing the pressure and decreasing the temperature
D
Decreasing the pressure and increasing the temperature
Question 198Single Answer
Select the correct order of evaporation for water, alcohol, petrol and kerosene oil:
A
water > alcohol > kerosene oil > petrol
B
alcohol > petrol > water > kerosene oil
C
petrol > alcohol > water . kerosene oil
D
petrol > alcohol > kerosene oil > water
Question 199Single Answer
The evaporation of a liquid can best be carried out in a.
A
flask
B
china dish
C
test–tube
D
beaker
Question 200Single Answer
The melting point temperature of the solid state of a substance is 40° C. The freezing point temperature of the liquid state of the same substance will be.
A
35°C
B
40°C
C
45°C
D
can't predict
Question 201Single Answer
Which one will help to accelerate the process of evaporation of a liquid kept in an open china dish ?
A
Keeping dish in open
B
Blowing air into the liquid
C
Keeping the dish under a running fan
D
All of the above
Question 202Single Answer
When a gas is compressed keeeping temperature constant, it result in.
A
increase in speed of gaseous molecules
B
increase in collision among gaseous molecules
C
ecrease in speed of gaseous molecules
D
decrease in collision among gaseous molecules
Question 203Single Answer
Which of the following in an element ?
A
Marble
B
Graphite
C
Washing stone
D
Stone
Question 204Single Answer
An atom is.
A
The smallest particle of matter known
B
The smallest particle of a gas
C
The smallest indivisible particle of an element that can tak part in a chemical change
D
Radioactive emission
Question 205Single Answer
Which of the following is a compound ?
A
Stainless steel
B
Brass
C
Iron sulphide
D
Diamond
Question 206Single Answer
Select the one that has a definite boiling point.
A
true solution
B
compound
C
colloid
D
All of these
Question 207Single Answer
we can see the particles of a collidal solution with.
A
naked eyes
B
the help of ultramicroscope
C
the help of microscope
D
None of these
Question 208Single Answer
Which of the following will yield a mixture ?
A
Crushing of marble tile
B
Breaking of ice–cubes
C
Addition of sodium metal to water in a china dish
D
Agitating a detergent with water in a washing machine
Question 209Single Answer
On passing through a colloidal solution, the beam of light gets..............
A
reflected
B
refracted
C
scattered
D
absorbed
Question 210Single Answer
How many chloride ions are surrounding sodium ion in sodium chloride crystal ?
A
4
B
8
C
6
D
12
Question 211Single Answer
Brass is an example of.
A
compound
B
element
C
homogeneous mixture
D
heterogeneous mixture
Question 212Single Answer
Air is regarded as mixture because.
A
its pressure may vary
B
its temperature may vary
C
its volume changes with change in temperature pressure
D
its composition may vary
Question 213Single Answer
The size of colloidal particles usually lies in the range.
A
10–5 – 10–7 cm
B
10–7 – 10–9 cm
C
10–3 – 10–5 cm
D
10–2 – 10–6 cm
Question 214Single Answer
Oil and water can form a stable dispersion with help of a third substance commonly called.
A
emulsifier
B
dispersant
C
protective colloid
D
None of these
Question 215Single Answer
The blue colour of water in the sea is due to.
A
absorption of other colour except blue by water molecules
B
scattering of blue light by sol particles
C
refraction of blue light by impurities present in seawater
D
reflection of blue sky by sea water
Question 216Single Answer
Tails of comets are visible due to.
A
Tyndall Effect
B
Reflection
C
Brownian movement
D
None of these
Question 217Single Answer
Why is helium preferred over hydrogen for use in airships ?
A
Helium has a low density
B
Helium has a high density
C
Helium is chemically less reactive
D
Helium is chemically more reactive
Question 218Single Answer
Which one of the following mixtures is homogeneous ?
A
Starch and sugar
B
Methanol and water
C
Graphite and charcoal
D
Calcium carbonate and calcium bicarbonate
Question 219Single Answer
During summer, wate kept in an earthen pot becomes cool because of the phenomenon of.
A
diffusion
B
transpiration
C
osmosis
D
evaporation
Question 220Single Answer
A few substance are arranged in the increasing order of 'force of attraction' between their particle, Which one of the following represents a correct arrangement ?
A
Water, air, wind
B
Air, sugar, oil
C
Oxygen, water, sugar
D
salt, juice, air
Question 221Single Answer
The boiling points of diethyl ether, acetone and n–butyl alcohol are 35°C, 56°C, and 118°C respectively. Which one of the following correctly represents their boiling points in kelvin scale ?
A
306K, 326K, 391K
B
308K, 329K, 392 K
C
308K, 329K, 391K
D
329K, 392K, 308K
Question 222Single Answer
In Which of the following conditions, the distance between the molecules of hydrogen gas would increase ?
(1) Increasing pressure on hydrogen contained in a closed container
(2) Some hydrogen gas leaking out of the container
(3) Increasing the volume of the container of hydrogen gas
(4) Adding more hydrogen gas to the container without increasing the volume of the container
A
1 and 3
B
1 and 4
C
2 and 3
D
2 and 4
Question 223Single Answer
Which of the following statements are true for pure substances ?
(1) Pure substances contain only one kind of particles
(2) Pure substances may be compounds of mixtures
(3) Pure substances have the same composition throughout
(4) Pure substances can be exemplified by all elements other than nickel
A
1 and 2
B
2 and 3
C
3 and 4
D
2 and 3
Question 224Single Answer
Tincture of iodine has antiseptic properties. This solution is made by dissolving.
A
iodine in potassium iodide
B
iodine in vaseline
C
iodine in water
D
iodine in alcohol
Question 225Single Answer
There are four test tubes A,B, C and D half filled with water. A considerable quantity of sugar, milk, egg white and common salt was added in them respectively with stirring the contents of each tube.
True solution will be obtained in
A
Only A
B
Only D
C
Both B and C
D
Both A and D
Question 226Single Answer
The example of solution of liquid in gas is.
A
Dry air
B
Sugar in water
C
mercury in gold
D
Moist air
Question 227Single Answer
The component of a solution which is present in larger amount is referred to as.
A
Solute
B
Solvent
C
Both (a) and (b)
D
Neither (a) nor (b)
Question 228Single Answer
You have prepared four different mixtures in water using
1. Charcoal powder, 2. Chalk powder, 3. Slaked lime and 4. Detergent powder. If you filter these mixtures through a filter paper, there will be no residue left after filtration in the case of.
A
Charcoal powder
B
chalk powder
C
slaked lime
D
detergent powder
Question 229Single Answer
A gas can be compressed to a fraction of its volume. The same volume of a gas can be spread all over a room. The reason for this is that.
A
the volume occupied by molecules of a gas is negligible as compared to the total volume of the gas
B
gases consists of molecules which are in a state of random motion
C
gases consist of molecules having very large intermolecular space which can be reduced or increased under ordinary conditions
D
None of these
Question 230Single Answer
Which has the least energetic molecules ?
A
Solids
B
Liquids
C
Gases
D
Plasmas
Question 231Single Answer
The process used to separate oil and water is.
A
distillation
B
sublimation
C
separating funnel
D
chromatography
Question 232Single Answer
A mixture of common salt, sulphur, sand and iron filings is shaken with carbon disulphide and filtered through a filter paper. The filtrate is evaporated to dryness in a china dish. What will be left in dish after evaporation ?
A
Sand
B
Sulphur
C
Iron filings
D
Common salt
Question 233Single Answer
White gold is used in jewelry and contains two elements, gold and palladium. A jeweler has two different samples that are both identical in appearence and have a uniform composition throughout. What can be said about the samples ?
A
They are homogeneous mixtures and be classified as metallic alloys
B
The materials are heterogeneous mixtures and can be classified by their components
C
The samples have variable compositions and are classified as metallic solution
D
The samples are heterogeneous mixtures that can be separated using magnetic properties
Question 234Single Answer
Which flow chart correctly describe a homogeneous materials ?
A
Unknown – density – 3 layers
B
Unknown – filtration – two substances
C
Unknown – magnet – two substances
D
Unknown – boiling – one temperature
Question 235Single Answer
Magnetism is most beneficial for separating.
A
gases and non – metalic liquids
B
magnetic solids and solids such as sulphur
C
non–metallic solids and solids such as sulphur
D
non–magnetic solids from non–magnetic liquids
Question 236Single Answer
Distillation is a good separation technique for.
A
solids
B
liquids
C
solid alloys
D
gases
Question 237Single Answer
Solubility is a good separation technique for.
A
solids
B
liquids
C
solid alloys
D
gases
Question 238Single Answer
40g of common salt is dissolved in 320 g of water. The mass percentage of salt is.
A
11.1%
B
12.5%
C
15%
D
10%
Question 239Single Answer
Water is boiling in open fry pan represents which type of change ?
A
Physical and irreversible
B
Chemical and irreversible
C
Physical and reversible
D
Chemical and reversible
Question 240Single Answer
Which of the following is a chemical change ?
A
Dent produced on car body by cricket ball
B
Streching of rubber band
C
Brinjals and apples becomes dark on exposure to atmosphere
D
Formation of salts by collecting sea water in shallows pits
Question 241Single Answer
The cause of Brownian movement is.
A
convection current
B
heat changes in liquid state
C
impact of molecules of dispersion medium on colloidal particles
D
attractive forces between particles of dispersed phase and dispersion medium
Question 242Single Answer
Which one among the following statements regarding the properties of mixtures and compounds is not correct ?
A
A mixture shows the properties of its constituents but the properties of a compound are entirely different from its constituents
B
A mixture may be homogeneous or heterogeneous but a compound is a homogeneous substance
C
The constitudents of amixture can be separated by physical methods but those of a compound cannot be separated by physical methods
D
Energy is either absorbed or evolved during the preparation of a mixture but not in the preparation of a compound
Question 243Single Answer
What is the term used to denote the criical temperature at which the air becomes saturated with vapour and below which the condensation is likely to begin ?
A
Condensation point
B
Evaporation point
C
Dew point
D
Point of critical temperature
Question 244Single Answer
Barrium in a suitable form is administered to patients before an X–ray examination of the stomach, because.
A
barium allows X–rays to pass through the stomach on account of its transparency to X–rays
B
barium is a good absorber of g–rays and this helps the stomach to appear clearly in contrast with the other regions in the picture
C
barium is a good absorber of X–rays and this helps the stomach to appear clearly conrast with the other regions in the picture
D
barium salts are white in colour and this helps the stomach to appear clearly in contrast with other regions in the pictures
Question 245Single Answer
Which one among the following statements about an atoms is not correct ?
A
Atoms always combine to form molecules
B
Atoms are the basic units from which molecules and ions are formed
C
Atoms are always neutral in nature
D
Atoms aggregate in large numbers to form the matter that we can see, feel and touch
Question 246Single Answer
Which of the following pair is/are correctly matched ?
1. Iosotopes : Atoms with same atomic number but different atomic mass
2. Isobars : Atoms with same number of neutrons but different atomic number
3. Isotones : Atoms with same mass number but different atomic number
Select the correct answer using the code given below: codes:
A
1, 2 and 3
B
1 only
C
1 and 2 only
D
2 only
Question 247Single Answer
An oxide of nitrogen has molecular weight 30. What is the number of electrons in one molecule of the compound ?
A
14
B
15
C
22
D
23
Question 248Single Answer
What is the weight of one atom of Hydrogen in grams ?
A
6.023 × 10–23
B
1.66 × 10–24
C
6.62 × 10–24
D
None of these
Question 249Single Answer
Which among the following is popularly called Hypo ?
A
Silver bromide
B
Silver nitrate
C
Sodium thiosulphate
D
Sodium phosphate
Question 250Single Answer
The number of neutrons in 27Al13 is.
A
40
B
27
C
14
D
13
Question 251Single Answer
Which of the following is a key component of effective teaching?
A
Memorization
B
Active Learning
C
Passive Learning
D
Focus on Test Scores
Question 252Single Answer
Which teaching method emphasizes student collaboration and problem-solving?
A
Lecture Method
B
Inquiry-Based Learning
C
Lecture and Note-taking
D
Drill and Practice
Question 253Single Answer
What does the Constructivist theory of learning emphasize?
A
Passive absorption of information
B
Learners constructing their own knowledge
C
Memorizing facts and figures
D
Teacher-centered instruction
Question 254Single Answer
Which of the following is not an effective classroom management strategy?
A
Clear communication of expectations
B
Positive reinforcement
C
Ignoring disruptive behavior
D
Consistent routines
Question 255Single Answer
Which of the following teaching strategies promotes higher-order thinking?
A
Recall-based questions
B
Lecture-based instruction
C
Problem-solving and critical thinking tasks
D
Multiple-choice questions
Question 256Single Answer
According to Vygotsky, the 'Zone of Proximal Development' refers to:
A
The range of tasks a student can perform alone
B
The range of tasks a student cannot perform, even with assistance
C
The tasks a student can perform with minimal support
D
The range of tasks a student can perform with the help of a more knowledgeable other
Question 257Single Answer
In Bloom's Taxonomy, which of the following is the highest level of cognitive skills?
A
Knowledge
B
Comprehension
C
Synthesis
D
Evaluation
Question 258Single Answer
Which of the following best describes the purpose of differentiated instruction?
A
To maintain uniformity in teaching
B
To meet the varied learning needs of students
C
To make learning more challenging for all students
D
To reduce the workload for the teacher
Question 259Single Answer
The flipped classroom model primarily focuses on:
A
Teacher-centered direct instruction
B
Students learning at home through online resources
C
Learning through textbooks alone
D
Peer-teaching and collaboration
Question 260Single Answer
Which of the following is an example of an active learning strategy?
A
Reading a textbook chapter
B
Listening to a lecture
C
Group discussion and debates
D
Memorizing facts
Question 261Single Answer
What is the main focus of learner-centered teaching?
A
Teachers controlling the pace of the lesson
B
Encouraging students to take responsibility for their own learning
C
Focusing solely on lectures
D
Providing a rigid structure for the lesson
Question 262Single Answer
What type of teaching strategy is best for developing critical thinking skills?
A
Rote memorization
B
Lecture-based learning
C
Socratic questioning
D
Listening and note-taking
Question 263Single Answer
In what way does collaborative learning benefit students?
A
It encourages individual work
B
It allows students to learn only from the teacher
C
It helps students develop communication and teamwork skills
D
It focuses on rote memorization
Question 264Single Answer
Which of the following best describes 'scaffolding' in the context of teaching?
A
Giving all students the same level of support
B
Providing initial support that is gradually removed as students gain independence
C
Teaching without any prior assessment
D
Reducing the difficulty of tasks for students
Question 265Single Answer
The concept of 'multiple intelligences' was proposed by:
A
Jean Piaget
B
Howard Gardner
C
Lev Vygotsky
D
Benjamin Bloom
Question 266Single Answer
Which of the following is a key feature of inquiry-based learning?
A
Direct transmission of facts
B
Emphasis on rote memorization
C
Encouraging curiosity and self-directed investigation
D
Strictly following a teacher's script
Question 267Single Answer
Which is an example of summative assessment?
A
Formative quizzes
B
Student discussions
C
End-of-term exams
D
Peer feedback
Question 268Single Answer
Which of the following is an example of a 'constructivist' teaching strategy?
A
Lecture-based instruction
B
Problem-solving tasks
C
Memorization drills
D
Teacher-dominated discussions
Question 269Single Answer
What does the term 'active learning' refer to?
A
Students are passively listening to the teacher
B
Students are actively engaged in learning through participation
C
Students only study at home
D
Teachers provide answers for students
Question 270Single Answer
Integrating language across the curriculum helps students to:
A
Focus on one subject at a time
B
Develop language skills only in language classes
C
Use language skills in multiple subject areas
D
Avoid learning languages
Question 271Single Answer
In the context of teaching language across the curriculum, which strategy is most effective for supporting students' language development?
A
Focusing solely on language arts classes
B
Encouraging reading and writing in all subjects
C
Avoiding the use of specialized vocabulary
D
Using only oral communication in all lessons
Question 272Single Answer
Which of the following is a key feature of 'language awareness' in teaching?
A
Teaching grammar in isolation
B
Encouraging students to understand how language works in different subjects
C
Focusing only on speaking and listening skills
D
Relying on textbooks for all language learning
Question 273Single Answer
The integration of language skills in the science curriculum might involve:
A
Only reading scientific texts
B
Focusing solely on mathematical language
C
Using both writing and speaking skills to explain scientific concepts
D
Teaching science without any reference to language skills
Question 274Single Answer
Which of the following is an example of a language-rich classroom environment?
A
A classroom with few student interactions
B
A classroom where students primarily read textbooks
C
A classroom where students engage in discussions, writing tasks, and presentations
D
A classroom where only the teacher speaks
Question 275Single Answer
The process of 'academic language' development in students refers to:
A
Informal language used in daily conversation
B
The specialized language used in academic disciplines
C
The language used in creative writing
D
Language learned only in foreign language classes
Question 276Single Answer
Which teaching approach focuses on developing students' language proficiency in all subject areas, not just language arts?
A
Content-based instruction
B
Direct instruction
C
Passive learning
D
Grammar translation method
Question 277Single Answer
Which of the following is a method to enhance language learning across the curriculum?
A
Using visual aids and graphic organizers
B
Avoiding the use of academic vocabulary
C
Relying only on textbooks for language instruction
D
Focusing on oral language skills alone
Question 278Single Answer
What role does scaffolding play in teaching language across the curriculum?
A
It is used only in language arts classes
B
It involves providing support to help students engage with complex language in various subjects
C
It focuses on individual student assessments
D
It is used to reduce the use of language in lessons
Question 279Single Answer
Which of the following best describes the 'language demands' of a mathematics classroom?
A
Only speaking and listening
B
Reading and understanding word problems, using mathematical vocabulary
C
Focusing solely on calculations
D
Writing essays on mathematical concepts
Question 280Single Answer
In a history classroom, teaching students to use specialized vocabulary such as "primary sources," "perspective," and "historical evidence" is an example of: