GATE - General Chemistry 1000+ MCQ [Solved] PDF Download

1. In the common soda-acid fire extinguisher, the fire is put out by
A. acid fumes
B. sodium bicarbonate
C. carbon dioxide
D. sodium carbonate
Answer : C

2. Calomel is
A. lead chloride
B. mercurous chloride
C. mercuric chloride
D. calcium sulphate
Answer : B

3. Hydrogen gas has
A. a very sweet smell
B. a very pungent smell
C. an irritating smell
D. no smell at all
Answer : D

4. The raw materials used in the manufacture of cement are
A. brimstone and silica
B. limestone and clay
C. brimstone and clay
D. brimstone and limestone
Answer : B

5. The compound which is both an antiseptic and a disinfectant is
A. phenol
B. iodoform
C. bleaching powder
D. blue vitriol
Answer : A

6. Argyrol used as eye ointment is a solution of
A. hydrogen peroxide
B. silver nitrate
C. tincture iodine
D. m-cresol
Answer : B

7. Chloroform used as anaesthetic should be preserved In the dark in tightly stoppered bottles because otherwise
A. it becomes coloured
B. it gets evaporated in air
C. it gets oxidised to phosgene
D. it gets decomposed to chloropicrin
Answer : C

8. The name rubber was given by
A. Lavoisier
B. Priestley
C. Dalton
D. Avogadro
Answer : B

9. Which of the following is not a metal?
A. Lithium
B. Helium
C. Sodium
D. Cobalt
Answer : B

10. Petroleum ether is also known as
A. kerosene
B. naphtha
C. lubricating oil
D. asphalt
Answer : B

11. Which of the following can absorb gases quickly?
A. Activated charcoal
B. Anthracite coal
C. Diamond
D. Graphite
Answer : A

12. Phosgene is a compound of
A. red phosphorus and oxygen
B. white phosphorus and oxygen
C. carbon monoxide and chlorine
D. carbon dioxide and chlorine
Answer : C

13. In surgical operation, the anaesthetic commonly used nowadays is
A. iodoform
B. chloroform
C. nitrous oxide-ether mixture
D. chloroform-nitrous oxide mixture
Answer : C

14. The malarial parasite was discovered by
A. Sir Ronald Ross
B. Sir Francis Haig
C. Dr Jagadish Chandra Bose
D. Sir CV Raman
Answer : A

15. LSD is
A. an anaesthetic
B. a psychedelic drug
C. an antipyretic
D. an antibiotic
Answer : B

16. An acid which is used as a preservative for pickles is
A. hydrochloric acid
B. citric acid
C. tartaric acid
D. acetic acid
Answer : D

17. Cinnabar is an ore of
A. lead
B. zinc
C. mercury
D. chromium
Answer : C

18. The modern system of symbols was evolved by
A. Dalton
B. Cavendish
C. Avogadro
D. Berzelius
Answer : D

19. Mortar contains cement and sand in the ratio of
A. 1 : 1
B. 1 : 2
C. 2 : 3
D. 1 : 3
Answer : D

20. Hard water does not lather well with soap because
A. it contains carbonates of calcium and magnesium
B. it contains sodium chloride
C. it is highly coloured
D. it contains suspended impurities
Answer : A

21. White vitriol is
A. ZnSO4 . 7H2O
B. FeSO4 . 7H2O
C. MgSO4 . 7H2O
D. CaSO4 . 2H2O
Answer : A

22. Beri-beri is caused by deficiency of Vitamin
A. A
B. C
C. B12
D. B1
Answer : D

23. Colour blindness is
A. a congenital disease
B. a communicable disease
C. an acquired disease
D. a contagious disease
Answer : A

24. Which among the following is a local anaesthetic?
A. Chloroform
B. Morphine
C. Streptomycin
D. Cocaine
Answer : D

25. An important use of nitrous acid is in
A. the manufacture of explosives
B. the manufacture of dyes
C. refrigerators
D. the preparation of drugs
Answer : B

26. Apart from lead tetra-ethyl, the other compound used as antiknock is
A. n-heptane
B. n-octane
C. iso-heptane
D. iso-octane
Answer : D

27. Solder is an alloy of
A. tin and copper
B. tin and lead
C. tin and zinc
D. tin, copper and zinc
Answer : C

28. Iron is rendered passive by
A. conc. H2SO4
B. conc. HCl
C. conc. HNO3
D. acetic acid
Answer : C

29. A mixture of naphthalene and sand is separated by
A. evaporation
B. using a magnet
C. sublimation
D. sedimentation
Answer : C

30. Suspended impurities in water are effectively removed by
A. adding milk of lime
B. filtering through sand
C. adding filter alum
D. chlorination
Answer : C

31. Which of the following is not a chemical change?
A. Burning of magnesium ribbon in air
B. Distillation of water
C. Heating of cane sugar
D. Setting of cement
Answer : B

32. The substance preserved under water is
A. potassium
B. sodium
C. red phosphorus
D. white phosphorus
Answer : D

33. Which of the following is not a supporter of combustion?
A. Oxygen
B. Air
C. Hydrogen
D. Chlorine
Answer : C

34. ________ is left behind after distillation of petroleum.
A. Arsenic
B. Barium
C. Benzene
D. Bitumen
Answer : D

35. Solid carbon dioxide is used
A. as a drying agent
B. as a refrigerant
C. as an antiseptic
D. as a bleaching agent
Answer : B

36. The sugar which is used in silvering mirrors is
A. sucrose
B. maltose
C. glucose
D. fructose
Answer : C

37. Galvanising is the process of coating
A. iron with zinc
B. zinc with iron
C. copper with silver
D. silver with gold
Answer : A

38. Which one of the following metals is used to extract another metal?
A. Lead
B. Tin
C. Zinc
D. Aluminium
Answer : D

39. The science which deals with the chemistry of life processes is known as
A. electrochemistry
B. physical chemistry
C. biochemistry
D. tinctorial chemistry
Answer : C

40. Nylon is made from
A. terephthalic acid and ethylene glycol
B. hexamethylene diamine and adipic acid
C. cellulose nitrate
D. cellulose acetate
Answer : B

41. Gold dissolves in aqua regia due to the formation of
A. chloro auric acid
B. auric chloride
C. gold nitrate
D. aurous chloride
Answer : A

42. Which of the following biology laboratory?
A. Phenol
B. Benzaldehyde
C. Formaldehyde
D. Acetic acid
Answer : C

43. In the making of jewels, gold is usually mixed with
A. zinc
B. tin
C. copper
D. aluminium
Answer : C

44. The scientist who synthesised the first organic compound (urea) in the laboratory was
A. Wohler
B. Dalton
C. Lavoisier
D. Fischer
Answer : A

45. A compound used both as a fungicide and as a disinfectant is
A. chlorine
B. carbon monoxide
C. sulphur dioxide
D. o-cresol
Answer : C

46. Artificial diamonds were produced by
A. Moissan
B. Davy
C. Faraday
D. Marie Curie
Answer : A

47. Rusting of iron cannot be prevented by
A. painting
B. applying alkaline phosphate
C. applying soap water
D. galvanising
Answer : C

48. Burglar proof safes are made of
A. Tungsten steel
B. Manganese steel
C. Chromium steel
D. Nickel steel
Answer : B

49. Cupellation is used in the purification of
A. Lead
B. Tin
C. Silver
D. Gold
Answer : C

50. Biogas is obtained during
A. decomposition of petrol
B. fermentation of animal and plant waste
C. destructive distillation of coal
D. electrolysis of water
Answer : B