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 2Single 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 3Single Answer
The one which decreases with dilution is
A
molar conductance
B
conductance
C
specific conductance
D
equivalent conductance
Question 4Single 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 5Single 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 6Single 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 7Single 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 8Single 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 9Single 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 10Single 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 11Single 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 12Single 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 13Single 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 14Single Answer
The one which has least iodine value is
A
sunflower oil
B
ginger oil
C
ghee
D
groundnut oil
Question 15Single 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 16Single 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 17Single 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 18Single 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 19Single Answer
In thermite process the metal used as reducing agent is:
A
Nickel
B
Zinc
C
Sodium
D
Aluminium
Question 20Single 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 21Single Answer
The base present in DNA, but not in RNA is:
A
Guanine
B
Adenine
C
Uracil
D
Thymine
Question 22Single Answer
The total number of lattice arrangements in different crystal system is:
A
7
B
3
C
8
D
14
Question 23Single Answer
Alcoholic potash is used to bring about :
A
Dehydrogenation
B
Dehydration
C
Dehydrohalogenation
D
Dehalogenation
Question 24Single Answer
Which of the following is the correct statement?
A
Order of a reaction has always an integral value
B
Mechanism of a reaction proposed is always final
C
Zero order reactions are multi-step reactions
D
Order of reaction can be predicted even without knowing the rate law
Question 25Single Answer
The unit of quantity of electricity is:
A
Ohm
B
Ampere
C
Coulomb
D
Volt
Question 26Single Answer
Which of the following organic compounds answers both iodoform test and fehling’s test ?
A
Methanal
B
Ethanol
C
Propane
D
Ethanal
Question 27Single Answer
10 dm3 of N2 gas and 10 dm3 of gas X at the same temperature and pressure contain the same number of molecules.
A
NO
B
H2
C
CO2 or CO
D
All of these
Question 28Single Answer
When the electrons of hydrogen atoms return to L shell from shells of higher energy, we get a series of lines in the spectrum. This series is called
A
Balmer series
B
Lyman series
C
Bracket series
D
Paschen series
Question 29Single Answer
The alcohol obtained by the hydrolysis of oils and fats is:
A
Glycol
B
Glycerol
C
Propanol
D
Pentanol
Question 30Single Answer
Which of the following alloys is used for making magnets for hearing aids?
A
Alnico
B
German silver
C
Invar
D
Monel metal
Question 31Single Answer
Which of the following is not a synthetic fibre:
A
Anygora
B
Rayon
C
Nylon
D
Polyster
Question 32Single Answer
Which one of the following is not contained in Portland cement ?
A
Ca3Al2O6
B
Ca3SiO5
C
Ca2SiO4
D
Ca3(PO4)2
Question 33Single 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 34Single Answer
Which fertilizer is assimilated directly by the plant ?
A
Super phosphate
B
Nitrolim
C
Muriate of Potash
D
Humus
Question 35Single 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 36Single Answer
What is a mixture of potassium nitrate, powdered charcoal and sulphur called ?
A
Glass
B
Cement
C
paint
D
Gun powder
Question 37Single 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 38Single 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 39Single 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 40Single 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 41Single Answer
Which one of the following is another name of RDX
A
Cyanohydrin
B
Dextran
C
Cyclohexane
D
Cyclonite
Question 42Single Answer
Which one of the following is used as an explosive ?
A
Phosphorus trichloride
B
Mercuric oxide
C
Graphite
D
Nitroglycerine
Question 43Single 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 44Single 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 45Single Answer
Which one of the following is not used as fertilizer ?
A
Ammonium nitrate
B
Ammonium sulphide
C
Ammonium phosphate
D
Ammonium sulphate
Question 46Single 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 47Single 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 48Single 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 49Single Answer
A complete fertilizer provides
A
N,P, K
B
S, K, N
C
S, B, K
D
N, S, P
Question 50Single 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
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Concerned Subject (Chemistry)
Question 51Single 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 52Single Answer
Petrochemicals are obtained from.
A
coal
B
petroleum
C
coal tar
D
All of these
Question 53Single Answer
The use of chemicals for treatment of diseases is called as.
A
isothermotherapy
B
angiotherapy
C
physiotherapy
D
chemotherapy
Question 54Single Answer
Which of the following is a hypnotic drug ?
A
luminal
B
salol
C
catechol
D
chemisol
Question 55Single 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 56Single 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 57Single Answer
Glass is a.
A
liquid
B
colloid
C
non–crystalline amorphous solid
D
crystalline solid
Question 58Single Answer
Which one of the following acids is used for etching glass ?
A
H2SO4
B
HNO3
C
HF
D
HCI
Question 59Single 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 60Single 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 61Single Answer
Who proposed the modern periodic law?
A
Henry Moseley
B
Dmitri Mendeleev
C
John Dalton
D
Lothar Meyer
Question 62Single Answer
The modern periodic table is arranged based on:
A
Atomic number
B
Atomic mass
C
Mass number
D
Neutron number
Question 63Single Answer
How many periods are in the modern periodic table?
A
6
B
7
C
8
D
9
Question 64Single Answer
How many groups are in the modern periodic table?
A
16
B
14
C
20
D
18
Question 65Single Answer
Which block contains the alkali metals?
A
p-block
B
s-block
C
d-block
D
f-block
Question 66Single Answer
Which block includes the noble gases?
A
s-block
B
f-block
C
d-block
D
p-block
Question 67Single Answer
The f-block elements are also known as:
A
Inner transition metals
B
Transition metals
C
Halogens
D
Alkaline earth metals
Question 68Single Answer
Which period contains the lanthanides?
A
5th period
B
7th period
C
6th period
D
4th period
Question 69Single Answer
Which group contains the halogens?
A
Group 15
B
Group 16
C
Group 17
D
Group 18
Question 70Single Answer
Which element is in Group 1, Period 2?
A
Sodium
B
Potassium
C
Lithium
D
Hydrogen
Question 71Single Answer
The d-block elements are found in:
A
Groups 1 and 2
B
Groups 13 to 18
C
Groups 3 to 12
D
Groups 15 to 17
Question 72Single Answer
Which period contains 32 elements?
A
5th period
B
7th period
C
6th period
D
4th period
Question 73Single Answer
The s-block elements include:
A
Alkali metals and halogens
B
Alkali metals and alkaline earth metals
C
Transition metals
D
Noble gases
Question 74Single Answer
Which element is in Group 18, Period 3?
A
Xenon
B
Neon
C
Krypton
D
Argon
Question 75Single Answer
The periodic table was first proposed by:
A
John Newlands
B
Henry Moseley
C
Dmitri Mendeleev
D
Antoine Lavoisier
Question 76Single Answer
Which block contains the actinides?
A
s-block
B
p-block
C
f-block
D
d-block
Question 77Single Answer
Which group is known as the alkaline earth metals?
A
Group 1
B
Group 17
C
Group 2
D
Group 18
Question 78Single Answer
The number of elements in the 4th period is:
A
8
B
10
C
32
D
18
Question 79Single Answer
Which element is not a p-block element?
A
Chlorine
B
Nitrogen
C
Aluminum
D
Iron
Question 80Single Answer
The lanthanides and actinides are placed:
A
At the bottom of the periodic table
B
Within the main periodic table
C
In Group 18
D
In Period 4
Question 81Single Answer
Which group contains the most reactive metals?
A
Group 2
B
Group 1
C
Group 17
D
Group 18
Question 82Single Answer
The number of valence electrons in Group 16 elements is:
A
4
B
5
C
6
D
7
Question 83Single Answer
Which period contains only s- and p-block elements?
A
5th period
B
4th period
C
3rd period
D
6th period
Question 84Single Answer
The element in Group 13, Period 3 is:
A
Boron
B
Aluminum
C
Gallium
D
Indium
Question 85Single Answer
Which block contains elements with partially filled d-orbitals?
A
s-block
B
p-block
C
d-block
D
f-block
Question 86Single Answer
The periodic table is divided into how many blocks?
A
4
B
3
C
2
D
5
Question 87Single Answer
Which group contains the chalcogens?
A
Group 16
B
Group 15
C
Group 17
D
Group 18
Question 88Single Answer
The element in Group 2, Period 4 is:
A
Magnesium
B
Strontium
C
Calcium
D
Barium
Question 89Single Answer
Which period includes the first transition series?
A
3rd period
B
6th period
C
5th period
D
4th period
Question 90Single Answer
The noble gases are chemically inert due to:
A
Incomplete valence shells
B
Low electronegativity
C
High ionization energy
D
Complete valence shells
Question 91Single Answer
The translational partition function is inversely proportional to:
A
Volume of the system
B
Mass of the particle
C
Temperature
D
Planck’s constant
Question 92Single Answer
For a diatomic molecule, the vibrational partition function is significant at:
A
High temperatures
B
Low temperatures
C
Absolute zero
D
Constant volume
Question 93Single Answer
The rotational partition function for a nonlinear molecule depends on:
A
One moment of inertia
B
Two moments of inertia
C
Three moments of inertia
D
Vibrational frequency
Question 94Single Answer
The electronic partition function is typically:
A
Large for metals
B
Small for most molecules at room temperature
C
Zero for all molecules
D
Infinite for gases
Question 95Single Answer
The partition function is used to calculate the:
A
Chemical potential only
B
Total volume
C
Average energy of a system
D
Pressure only
Question 96Single Answer
The vibrational partition function for a harmonic oscillator assumes:
A
Equally spaced energy levels
B
Unequally spaced energy levels
C
Continuous energy levels
D
No energy levels
Question 97Single Answer
The partition function is a key concept in which statistical mechanics ensemble?
A
Microcanonical ensemble
B
Canonical ensemble
C
Grand canonical ensemble
D
Isothermal-isobaric ensemble
Question 98Single Answer
The partition function is used to calculate the:
A
Pressure of a system
B
Volume of a system
C
Mass of a system
D
Charge of a system
Question 99Single Answer
The chemical potential \( \mu \) is related to the partition function in:
A
Canonical ensemble
B
Grand canonical ensemble
C
Microcanonical ensemble
D
Isobaric ensemble
Question 100Single Answer
The partition function can be used to calculate:
A
Bond energy
B
Rate constant
C
Activation energy
D
Equilibrium constant
Question 101Single Answer
The translational partition function contributes to:
A
Chemical potential only
B
Entropy only
C
Enthalpy only
D
Internal energy and pressure
Question 102Single Answer
The rotational partition function contributes significantly to the:
A
Heat capacity of diatomic gases
B
Heat capacity of monoatomic gases
C
Entropy of solids
D
Pressure of liquids
Question 103Single Answer
The vibrational partition function is used to calculate:
A
Electronic energy
B
Translational energy
C
Vibrational contribution to internal energy
D
Rotational energy
Question 104Single Answer
The equilibrium constant of a reaction can be derived from:
A
The sum of partition functions
B
The ratio of partition functions of products and reactants
C
The difference of partition functions
D
The product of partition functions
Question 105Single Answer
The partition function is used to calculate the:
A
Gibbs free energy
B
Bond length
C
Ionization energy
D
Electron affinity
Question 106Single Answer
The translational partition function contributes to the:
A
Pressure of an ideal gas
B
Vibrational energy
C
Rotational energy
D
Electronic energy
Question 107Single Answer
The internal energy of a monoatomic ideal gas is:
A
\( NkT \)
B
\( \frac{3}{2} NkT \)
C
\( \frac{1}{2} NkT \)
D
\( 2 NkT \)
Question 108Single Answer
The partition function relates to the average energy via:
A
\( \langle E \rangle = -kT \ln Q \)
B
\( \langle E \rangle = \frac{\partial \ln Q}{\partial \beta} \)