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Question Bank

DFSL Scientific Assistant Exam (Chemistry) - English

Duration: 120 · Questions: 100 · Max Marks: 200 · Language: 1

View DFSL Scientific Assistant 2026 Exam Page

General Knowledge

1
Yojna a weekly journal
  1. A.Ministry of Finance        
  2. B.Ministry of Information and Broadcastin
  3. C.Ministry of Rural Development
  4. D.Planning Commission
2
Kurukshetra a journal on rural development is published by
  1. A.Ministry of Finance 
  2. B.Ministry of Information and Broadcastin
  3. C.Ministry of Rural Development
  4. D.Planning Commission
3
Devaluation of a currency means
  1. A.Fixing the value of the currency in conjuction with the movement in the value of a basket of predetermined currencies
  2. B.Reduction in the value of a currency vis-à-vis major internationally traded currencies
  3. C.Fixing the value of currency in multilateral consultaion with the IMF the World Bank and major trading partners
  4. D.Permitting the currency to seek its worth in the international market
4
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
  1. A.1 and 3
  2. B.2 and 3
  3. C.1 and 2
  4. D.1,2 and 3
5
Which of the following programmes aims at the promotion of savings among rural women
  1. A.Rashtriya Mahila Kosh
  2. B.Indira Mahila Yojna
  3. C.Jawahar Rozgar Yojna
  4. D.Mahila Samridhi Yojna
6
On which date is Maharashtra Day celebrated ?
  1. A.May 1
  2. B.May 2
  3. C.May 3
  4. D.May 4
7
On which date is Shivaji Maharaj's birth anniversary celebrated ?
  1. A.February 19
  2. B.February 20
  3. C.February 2
  4. D.February 22
8
On which date is Chhatrapati Shivaji Maharaj Jayanti celebrated ?
  1. A.February 19
  2. B.February 20
  3. C.February 21
  4. D.February 22
9
On which date is Dr. Babasaheb Ambedkar Jayanti celebrated ?
  1. A.April 14
  2. B.April 15
  3. C.April 16
  4. D.April 17
10
On which date is Maharashtra Rajya Sthapana Divas celebrated ?
  1. A.May 1
  2. B.May 2
  3. C.May 3
  4. D.May 4
11
On what date did India celebrate the 9th anniversary of the Goods and Services Tax (GST) implementation?
  1. A.July 1, 2026
  2. B.June 30, 2026
  3. C.July 2, 2026
  4. D.June 29, 2026
12
Which global event is India participating in with Sweden as a partner?
  1. A.Venus Orbiter Mission 'Shukrayaan'
  2. B.Chandrayaan-4
  3. C.Gaganyaan crewed mission
  4. D.Mars Orbiter Mission-2
13
Who became India's 97th Chess Grandmaster in late June 2026?
  1. A.Gukesh D
  2. B.Praggnanandhaa R
  3. C.Harshavardhan G.B.
  4. D.Arjun Erigaisi
14
What major merger was approved by the boards of PFC and REC Limited on June 30, 2026?
  1. A.Merger with SBI
  2. B.Merger into a single power financing entity
  3. C.Merger with NTPC
  4. D.Merger with IREDA
15
Which initiative was launched at the Rashtriya Gramin Vikas Sammelan 2026 for rural women SHGs?
  1. A.Lakhpati Didi App
  2. B.Digital India Rural Scheme
  3. C.PM Kisan Drone Yojana
  4. D.SARAS Shakti Collection and Coffee Table Book

English Language

1
I go to Madurai by —– Vaigai Express
  1. A.a
  2. B.an
  3. C.some
  4. D.the
2
Have the car stolen!
  1. A.Steal the car
  2. B.You should have the stolen car
  3. C.Get someone to steal the car
  4. D.They have stolen the car
3
The payment was collected by the hardworking salesman.
  1. A.The hardworking salesman collected the payment.
  2. B.the salesman who worked heard was able to collect the payment.
  3. C.to collect the payment the salesman had to work hard.
  4. D.The hardworking salesman was able to collect the payment.
4
I had to stop all my work to complete this project.
  1. A.All other work had to be stopped to complete this project by me
  2. B.For completing this project all other work must be stopped
  3. C.For completing this project I had to stop all my work
  4. D.To complete this project all other work had been stopped by me
5
They have published the names of all the successful candidates.
  1. A.The candidates who have succeeded their names they had published.
  2. B.The names of all the successful candidates have been published by them
  3. C.The candidates who have succeeded their names have been published by them.
  4. D.The names of all the successful candidate were published by them. 
6
The online shopping site lowered the prices.
  1. A.Lowering of the prices was done by the online shopping site
  2. B.The prices were lowered by the online shopping site
  3. C.The prices had been lowered by the online shopping site
  4. D.The prices have been lowered by the online shopping site
7
Who taught you to drive a truck ?
  1. A.To drive a truck by whom were you taught?
  2. B.Driving a truck by who were you taught?
  3. C.Driving a truck by who were you being taught?
  4. D.By whom were you taught to drive a truck?
8
We shall invite Suresh.
  1. A.Suresh would be invited by us
  2. B.Suresh would have been invited by us
  3. C.Suresh will be invited by us
  4. D.Suresh will have been invited by us
9
Dark clouds have overcast the evening sky.
  1. A.By the dark clouds the evening sky was overcast.
  2. B.The evening sky has been overcast by the dark clouds.
  3. C.Dark clouds overcastted the evening sky.
  4. D.The sky of the evening was overcasted by dark clouds.
10
The partners will celebrate their triumph tomorrow. 
  1. A.The triumph would be celebrated by the partners a day before
  2. B.The triumph would be celebrated by the partners a day after
  3. C.The triumph would have been celebrated by the partners a day after
  4. D.The triumph will have been celebrated by the partners tomorrow
11
Why did break the vase?
  1. A.why is the vase broken by him
  2. B.why was the vase broken by him
  3. C.why had been the vase broken by him
  4. D.why has been the vase broken by him
12
Mariam was writing a note to her boss.
  1. A.A note was written to her boss by Mariam
  2. B.A note was wrote by Mariam to her boss
  3. C.A note was being written by Mariam to her boss
  4. D.A note was written by Mariam to her boss
13
The baby really enjoys that music.
  1. A.That music was really enjoyed by the baby.
  2. B.That music was really being enjoyed by the baby.
  3. C.That music is really enjoyed by the baby.
  4. D.This music was really enjoyed by the baby.
14
The weather disrupted the final match.
  1. A.The final match has been disrupted by the weather.
  2. B.The final match had been disrupted by the weather.
  3. C.The final match was disrupted by the weather. 
  4. D.The final match was being disrupted by the weather.
15
The management committee is required to publish a report every year. 
  1. A.report would be published by the management committee every year.
  2. B.A report would have been published by the management committee every year.
  3. C.A report requires to be published by the management committee every year.
  4. D.Every year the report would be published by the management committee.

Reasoning

1
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?
  1. A.Two
  2. B.Three
  3. C.Five
  4. D.Four
  5. E.None of these
2
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
  1. A.True
  2. B.False
  3. C.Uncertain
  4. D.None
3
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.
  1. A.A
  2. B.E
  3. C.T
  4. D.X
  5. E.Y
4
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?
  1. A.None            
  2. B.One         
  3. C.Two       
  4. D.Three        
  5. E.More than three
5
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?
  1. A.None
  2. B.One
  3. C.Two
  4. D.Three
  5. E.More than three
6
How many meaningful words can be made from the letters ‘LMEA’ using each letter only once in each word?
  1. A.None
  2. B.One
  3. C.Two
  4. D.Three
  5. E.More than three
7
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.
  1. A.T
  2. B.L
  3. C.E
  4. D.Y
  5. E.X
8
If the letters of the word HANDOVER are arranged alphabetically from left to right how many letters will remain at the same position?
  1. A.None
  2. B.One
  3. C.Two
  4. D.Three
  5. E.More than three
9
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?
  1. A.None
  2. B.One
  3. C.Two
  4. D.Three
  5. E.More than three
10
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’.
  1. A.V
  2. B.T
  3. C.E
  4. D.A
  5. E.B
11
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 ?
  1. A.N
  2. B.Q
  3. C.J
  4. D.M
  5. E.None of these
12
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?
  1. A.None
  2. B.One
  3. C.Two
  4. D.Three
  5. E.None of these
13
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 .
  1. A.The only argument I is strong
  2. B.Only argument II is strong
  3. C.Either I or II is strong
  4. D.Neither I nor II is strong
14
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’.
  1. A.P
  2. B.L
  3. C.T
  4. D.X
  5. E.Y
15
How many meaningful English words can be formed with the letters RAE using each letter only once in each word?
  1. A.None
  2. B.One
  3. C.Two
  4. D.Three
  5. E.More than three

Marathi Grammar

1
पुढील शब्दाच्या कोणत्या भागाने "नामपद" शब्द सांगा?
  1. A. प्रयोगपद
  2. B. सर्वनाम
  3. C.  क्रियापद
  4. D. विशेषण
2
"आपल्या शिक्षकाने आमच्या विद्यालयातील पुस्तकांना सुंदर नाम" - या वाक्यात, कोणत्या शब्दाच्या भागाने "नाम" असा अर्थ आहे?
  1. A. सर्वनाम
  2. B. क्रियापद
  3. C. विशेषण
  4. D. नामपद
3
"रामला आपलं पुस्तकाचं अंगूठ नकलायला आहे" - या वाक्यात, कोणत्या शब्दाच्या भागाने "पुस्तकाचं" असा अर्थ आहे ?
  1. A. सर्वनाम
  2. B. क्रियापद
  3. C. विशेषण
  4. D. नामपद
4
"तुम्ही आपल्या मित्राला काय प्रेम करता?" - या वाक्यात, कोणत्या शब्दाच्या भागाने "मित्राला" असा अर्थ आहे ?
  1. A. सर्वनाम
  2. B. क्रियापद
  3. C. विशेषण
  4. D. नामपद
5
"सर्व विद्यार्थ्यांना आवश्यक गोड अभ्यास करावा" - या वाक्यात, कोणत्या शब्दाच्या भागाने "विद्यार्थ्यांना" असा अर्थ आहे ?
  1. A. सर्वनाम
  2. B. क्रियापद
  3. C. विशेषण
  4. D. नामपद
6
"उपास्य देवतांच्या पूजेसाठी फूल घालता येतात" - या वाक्यात, कोणत्या शब्दाच्या भागाने "उपास्य" असा अर्थ आहे ?
  1. A. सर्वनाम
  2. B. क्रियापद
  3. C. विशेषण
  4. D. नामपद
7
"रामाने गुलाब लावलं" - या वाक्यात, कोणत्या शब्दाच्या भागाने "रामाने" असा अर्थ आहे ?
  1. A. सर्वनाम
  2. B. क्रियापद
  3. C. विशेषण
  4. D. नामपद
8
"माझ्या आवडत्या पुस्तकात सर्व वस्तूंची फोटो आहे" - या वाक्यात, कोणत्या शब्दाच्या भागाने "माझ्या" असा अर्थ आहे ?
  1. A. सर्वनाम
  2. B. क्रियापद
  3. C. विशेषण
  4. D. नामपद
9
"हा पुस्तक तुम्हाला किती आवडला?" - या वाक्यात, कोणत्या शब्दाच्या भागाने "तुम्हाला" असा अर्थ आहे ?
  1. A. सर्वनाम
  2. B. क्रियापद
  3. C. विशेषण
  4. D. नामपद
10
"माझ्या आवडत्या फुलाच्या रंगात तुम्ही त्याचा उपयोग कसा करता?" - या वाक्यात, कोणत्या शब्दाच्या भागाने "तुम्ही" असा अर्थ आहे ?
  1. A. सर्वनाम
  2. B. क्रियापद
  3. C. विशेषण
  4. D. नामपद
11
"माझ्या घरात नाचलंय" - या वाक्यात, कोणत्या शब्दाच्या भागाने "माझ्या" असा अर्थ आहे ?
  1. A. सर्वनाम
  2. B. क्रियापद
  3. C. विशेषण
  4. D. नामपद
12
"आम्हाला विद्यापीठातील पुस्तके वाचायला आवश्यक आहेत" - या वाक्यात, कोणत्या शब्दाच्या भागाने "आम्हाला" असा अर्थ आहे ?
  1. A. सर्वनाम
  2. B. क्रियापद
  3. C. विशेषण
  4. D. नामपद
13
"उन्हाळ्यातलं वातावरण मस्त आहे" - या वाक्यात, कोणत्या शब्दाच्या भागाने "उन्हाळ्यातलं" असा अर्थ आहे ?
  1. A. सर्वनाम
  2. B. क्रियापद
  3. C. विशेषण
  4. D. नामपद
14
"मी तुमच्या मित्राला नमस्कार केलं" - या वाक्यात, कोणत्या शब्दाच्या भागाने "मी" असा अर्थ आहे ?
  1. A. सर्वनाम
  2. B. क्रियापद
  3. C. विशेषण
  4. D. नामपद
15
"माझ्या दोन शिक्षकांनी फुलांचं अंगूठ नकललं" - या वाक्यात, कोणत्या शब्दाच्या भागाने "माझ्या" असा अर्थ आहे ?
  1. A. सर्वनाम
  2. B. क्रियापद
  3. C. विशेषण
  4. D. नामपद

Chemistry

1
Which of the following is not a synthetic fibre:
  1. A.Anygora
  2. B.Rayon
  3. C.Nylon
  4. D.Polyster
2
Which one of the following is not contained in Portland cement ?
  1. A.Ca3Al2O6
  2. B.Ca3SiO5
  3. C.Ca2Si­O4
  4. D.Ca3(PO4)2
3
What is the reson for white cement to be white ?
  1. A.It does not contain carbon
  2. B.It does not contain silicon
  3. C.It does not contain iron
  4. D.It does not contain calcium
4
Which fertilizer is assimilated directly by the plant ?
  1. A.Super phosphate
  2. B.Nitrolim
  3. C.Muriate of Potash
  4. D.Humus
5
Which of the following chemicals is used in foam fire extinguishers ?
  1. A.Aluminium sulphate
  2. B.Copper sulphate
  3. C.Cobalt sulphate
  4. D.Nickel sulphate 
6
What is a mixture of potassium nitrate, powdered charcoal and sulphur called ?
  1. A.Glass
  2. B.Cement
  3. C.paint
  4. D.Gun powder
7
Which one of the following chemicals is used in beauty parlours for hair – setting ?
  1. A.Sulphur based
  2. B.Phosphorus based
  3. C.Silicon based
  4. D.Iron based 
8
Which one of the following is used as a mordant in dyeing and tanning industry ?
  1. A.Magnesium oxide
  2. B.Magnesium carbonate
  3. C.Magnesium chloride
  4. D.Magnesium sulphate
9
Which one of the following substances is used in the manufacture of safety matches ?
  1. A.Red phosphorus
  2. B.White phosphorus
  3. C.Phosphorus trioxide (P2O3)
  4. D.Black phosphorus
10
Which one of the following polymeric materials is used for making bullet proof jacket ?
  1. A.Nylon –6, 6
  2. B.Rayon
  3. C.Kevlar
  4. D.Dacron
11
Which one of the following is another name of RDX
  1. A.Cyanohydrin
  2. B.Dextran
  3. C.Cyclohexane
  4. D.Cyclonite
12
Which one of the following is used as an explosive ?
  1. A.Phosphorus trichloride
  2. B.Mercuric oxide
  3. C.Graphite
  4. D.Nitroglycerine
13
Flint glass is obtained from which of the following ?
  1. A.Zinc and barium borosilicate
  2. B.Sand, red lead and potassium carbonate
  3. C.Sodium aluminium borosilicate
  4. D.Pure silica and zinc oxide
14
Which one of the following correctly defines the state of glass ?
  1. A.Crystalline solid
  2. B.Super cooled liquid
  3. C.Condensed gas
  4. D.Liquid crystal
15
Which one of the following is not used as fertilizer ?
  1. A.Ammonium nitrate
  2. B.Ammonium sulphide
  3. C.Ammonium phosphate
  4. D.Ammonium sulphate   
16
Which one of the following elements is needed in the human body to transfer electrical signals by nerve cells ?
  1. A.Lithium
  2. B.Sodium
  3. C.Rubidium
  4. D.Caesium
17
Which one of the following is NOT true for bleaching powder ?
  1. A.It is used as a reducing agent in chemical industries
  2. B.It is used for bleaching wood pup in paper factories
  3. C.It is used for disinfecting drinking water
  4. D.It is used for bleaching linen in textile industry
18
Hard glass having the same ingredientsas soft glass excepts.
  1. A.hard glass have Na in place of K
  2. B.hard glass having K in place of Na
  3. C.hard glass having both Na and K
  4. D.None of the above
19
A complete fertilizer provides
  1. A.N,P, K
  2. B.S, K, N
  3. C.S, B, K
  4. D.N, S, P
20
Antacids are commonly used to get rid of acidity in the Stomach. A commonly used antacid is.
  1. A.sodium hydrogen phthalate
  2. B.magnesium hydroxide  
  3. C.calcium hydroxide
  4. D.manganese acetate
21
Annealing of glass is done to.
  1. A.make it brittle
  2. B.make it opaque
  3. C.make it transparent
  4. D.None of the above
22
Petrochemicals are obtained from.
  1. A.coal
  2. B.petroleum
  3. C.coal tar
  4. D.All of these
23
The use of chemicals for treatment of diseases is called as.
  1. A.isothermotherapy
  2. B.angiotherapy
  3. C.physiotherapy
  4. D.chemotherapy
24
Which of the following is a hypnotic drug ?
  1. A.luminal
  2. B.salol
  3. C.catechol
  4. D.chemisol
25
Teflon is a polymer of which of the following monomers ?
  1. A.Tetrafluoroethylene
  2. B.Vinyl chloride
  3. C.Acetylene dichloride  
  4. D.None of the above/More than one of the above
26
LPG used as domestic fuel chiefly contains–
  1. A.Methane
  2. B.Propane
  3. C.Ethylene
  4. D.Butane
  5. E.None of the above/More than one of the above     
27
Glass is a.
  1. A.liquid
  2. B.colloid
  3. C.non–crystalline amorphous solid
  4. D.crystalline solid
28
Which one of the following acids is used for etching glass ?
  1. A.H2SO4
  2. B.HNO3
  3. C.HF
  4. D.HCI
29
What is the purpose of adding plasticizers in paint manufacturing process ?
  1. A.They act as a film–forming constituent
  2. B.They reduce the viscosity
  3. C.They prevent the polymerization and condensation
  4. D.They provide elasticity to the film and minimize its cracking
30
Which raw material is used in the preperation of soft glass ?
  1. A.K2CO3, SiO2, CaCO3
  2. B.K2CO3, SiO2, PbCO3
  3. C.Na2CO3, SiO2, CaCO3
  4. D.Na2CO3, SiO2, PbO
31
What is the composition of nitrolim – a chemical fertilizer ?
  1. A.Nitrogen and limestone
  2. B.Calcium carbide and nitrogen
  3. C.Calcium carbide and carbon
  4. D.None of above
32
the major component used in preparation of different type of glasses is.
  1. A.Silica
  2. B.Sodium borate
  3. C.Calcium silicate
  4. D.Sodium silicate
33
Salts of which of the following elements provide colours to fireworks ?
  1. A.Zinc and sulphur
  2. B.Potassium and mercury
  3. C.Strontium and barium
  4. D.Chromium and nickel
34
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:
  1. A.Both Statement I and II are correct and Statement II is the correct explanation of Statement I
  2. B.Both Statement I and Statement II are true but Statement II is NOT the correct explanation of Statement I
  3. C.Statement I is correct, but Statement II is incorrect
  4. D.Statement I is incorrect, but Statement II is correct
35
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:
  1. A.Both Statement I and II are individually correct and Statement II is the correct explanation of Statement I
  2. B.Both Statement I and Statement II are individiaully correct but Statement II is not the correct explanation of Statement I
  3. C.Statement I is correct, but Statement II is incorrect
  4. D.Statement I is incorrect, but Statement II is correct
36
Terfenadine is commonly used as a/an.
  1. A.transquilizer
  2. B.antihistamine
  3. C.antimicrobial
  4. D.antibiotic
37
Which one of the following is not a tranqualizer ?
  1. A.Equanil
  2. B.Veronal
  3. C.Salvarsan
  4. D.Serotonin
38
Barbituric acid and its derivatives are well known.
  1. A.antipyretics    
  2. B.analgesics
  3. C.antiseptics  
  4. D.tranquilizers 
39
Which one among is not an analgesic ?
  1. A.Ibuprofen
  2. B.Naproxen
  3. C.Aspirin
  4. D.Valium
40
Various phenol derivatives, tincture of iodine (2 – 3%) I 2 in (water/alcohol) and some dyes like methylene blue are.
  1. A.antiseptics
  2. B.disinfectants
  3. C.analgesics
  4. D.antipyretics