1000+ General Chemistry Multiple Choice Question Answer [Solved]

1. In addition to nitric acid, another acid which may render iron passive is
A. acetic acid
B. oxalic acid
C. chromic acid
D. citric acid
Answer : C

2. Deficiency of iron causes
A. nervous disorders
B. heart diseases
C. anaemia
D. impairment of vision
Answer : C

3. When ants bite, they inject
A. glacial acetic acid
B. methanol
C. formic acid
D. stearic acid
Answer : C

4. The fertilizer which has the largest percentage of nitrogen is
A. urea
B. ammonium nitrate
C. ammonium sulphate
D. calcium cyanamide
Answer : A

5. The formula for cane sugar is
A. C6H12O6
B. C2H5OH
C. C12H22O11
D. C7H8O
Answer : C

6. Which among the following gases present in the air discolours brass nameplates?
A. Hydrogen Sulphide
B. Nitrogen
C. Carbon-di-oxide
D. Oxygen
Answer : C

7. 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

8. The gas evolved when ammonium nitrate is heated is
A. nitrogen
B. nitric oxide
C. nitrogen peroxide
D. nitrous oxide
Answer : D

9. High temperature thermometers use
A. sodium amalgam
B. an alloy of sodium and potassium
C. silver amalgam
D. calcium amalgam
Answer : B

10. Brass contains
A. copper and tin
B. aluminium and magnesium
C. copper and zinc
D. copper, tin and zinc
Answer : C

11. The freezing point of water at 760 mm pressure is
A. 273 K
B. 0 K
C. 273°C
D. -273°C
Answer : A

12. 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

13. A hormone which contains iodine is
A. adrenalin
B. glucagon
C. epinephrin
D. thyroxin
Answer : D

14. A metal which occurs 'free' in nature is
A. gold
B. zinc
C. tin
D. molybdenum
Answer : A

15. A valuable by-product in the manufacture of soap is
A. stearic acid
B. sodium hydroxide
C. palmitic acid
D. glycerol
Answer : D

16. A drug that is usually administered for malaria is
A. sulphanilamide
B. quinine
C. methicillin
D. novocaine
Answer : B

17. Annealing of glass is done in
A. a cupel
B. a long narrow chamber
C. an open furnace
D. a closed furnace
Answer : B

18. Compounds of nitrogen with metals are called
A. nitrates
B. nitrites
C. hyponitrates
D. nitrides
Answer : D

19. The simplest hydrocarbon is
A. benzene
B. methane
C. ethane
D. butane
Answer : B

20. Which of the following is used in fuel to propel rockets?
A. Petrol
B. Kerosene
C. Hydrazine
D. Alcohol
Answer : C

21. In the mouth, starch is converted into ______ by the action of saliva.
A. sucrose
B. glucose
C. fructose
D. mannose
Answer : D

22. Plaster of Paris
A. contracts while setting
B. expands while setting
C. is highly volatile
D. does not suffer any changes in volume while setting
Answer : B

23. In the process of purification of water for town supply, the substance used to remove bad smell and colour from water is
A. charcoal
B. bleaching powder
C. chlorine
D. carbolic acid
Answer : A

24. Which of the following represents a physical change?
A. sublimation
B. oxidation
C. reduction
D. decomposition
Answer : A

25. Which of the following types of water gives lather easily with soap?
A. Hard water
B. Heavy water
C. Soft water
D. Both (a) and (b)
Answer : C

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

27. The alloy added in the preparation of steel contains
A. Fe and C
B. Mn and C
C. Fe and Mn
D. Fe, Mn and C
Answer : D

28. A non-metal which is a good conductor of electricity is
A. graphite
B. phosphorus
C. sulphur
D. iodine
Answer : A

29. According to the modern Periodic Law, the properties of elements are periodic functions of their
A. valency
B. atomic mass
C. number of neutrons
D. atomic number
Answer : D

30. The most abundant constituent in air is
A. hydrogen
B. nitrogen
C. oxygen
D. noble gases
Answer : B

31. Which one of the following gases is extremely soluble in water?
A. Carbon dioxide
B. Ammonia
C. Chlorine
D. Hydrogen sulphide
Answer : B

32. The pH or pure water is nearly 7.0 It will increase on the addition or
A. hydrochloric acid
B. ammonia
C. cane sugar
D. common salt
Answer : B

33. Iron is coated with zinc to prevent rusting. The process is called
A. annealing
B. tempering
C. calcining
D. galvanising
Answer : D

34. One of the ingredients of the paste on the side of a match box is
A. phosphorus pentaoxide
B. phosphorus trichloride
C. phosphorus trisulphide
D. phosphorus trioxide
Answer : C

35. Which of the following statements regarding natural radioactivity is true?
A. It is spontaneous disintegration of atoms
B. It is induced by bombardment with projectiles
C. It is transmutation of atoms with projectiles
D. It is dependent on temperature
Answer : A

36. The Combined Gas Law equation is
A. P1V1T1 = P2 V2 T2
B. P1V1T2 = P2V2T1
C. P = P1 + P2 + P3
D. C =
Answer : B

37. Rayon la made from
A. cotton
B. wool
C. cellulose
D. silk
Answer : C

38. Which or the following gases is soluble in water and Is collected by the downward displacement or air?
A. Carbon dioxide
B. Sulphur dioxide
C. Ammonia
D. Hydrogen
Answer : C

39. The poisonous nature of carbon monoxide is due to
A. cutting off supply of oxygen
B. it™s being converted into carbon dioxide
C. its combination with haemoglobin of blood
D. its blocking of vocal chords
Answer : C

40. Which one of the following is used in dry cleaning of garments?
A. asphalt
B. naphtha
C. diesel oil
D. lubricating oil
Answer : B

41. The iron salt used in blue prints is
A. ferric sulphate
B. ferric oxalate
C. ferric nitrate
D. ferric chloride
Answer : B

42. Which of the following is not a chemical change?
A. Rusting of iron
B. Burning of magnesium
C. Sublimation of iodine
D. Electrolysis of water
Answer : C

43. Water has an unusually high bolling point because
A. its molecular weight is low
B. it is denser than ice
C. it is a good solvent for many ionic substances
D. the molecules of water are joined by hydrogen bonds
Answer : D

44. The raw materials required for the manufacture of glass are
A. silica, sodium nitrate and soda ash
B. silica, limestone and sodium nitrate
C. silica, sodium oxide and limestone
D. silica, soda ash and limestone
Answer : D

45. Soda-water contains
A. sodium bicarbonate
B. sodium carbonate
C. carbonic acid
D. sodium hydroxide
Answer : C

46. Gasoline is obtained from crude petroleum by
A. fractional distillation
B. fractional crystallisation
C. sublimation
D. evaporation
Answer : A

47. 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

48. A compound of carbon used as anaesthetic is
A. carbon disulphide
B. carbon tetrachloride
C. phosgene
D. chloroform
Answer : D

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

50. Setting of cement is due to
A. hydration
B. dehydration
C. dialysis
D. osmosis
Answer : A