1000+ General Chemistry Multiple Choice Question Answer [Solved]

1. Reduction involves
A. loss of electrons
B. gain of electrons
C. gain of oxygen
D. removal of hydrogen
Answer : B

2. Mild steel contains
A. iron with very low percentage of carbon
B. iron with high percentage of carbon
C. iron and chromium
D. iron and manganese
Answer : A

3. Which is the 'odd man' in the following?
A. brass
B. common salt
C. cane sugar
D. water
Answer : A

4. The number of neutrons in the nucleus of an atom of mass A and atomic number Z is given by
A. A - Z
B. A + Z
C. Z
D. A
Answer : A

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

6. A burning substance which continues to burn in a jar of carbon dioxide is
A. zinc
B. red phosphorus
C. magnesium
D. sulphur
Answer : C

7. The form of carbon used in decolourising sugar solution is
A. wood charcoal
B. animal charcoal
C. coconut charcoal
D. lamp black
Answer : B

8. In the nitrogen cycle, denitrifying bacteria
A. oxidise ammonia to nitrates
B. convert nitrogen into ammonia
C. oxidise ammonia to free nitrogen
D. oxidise ammonia to oxides of nitrogen
Answer : C

9. Marsh gas is
A. ethane
B. ethylene
C. acetylene
D. methane
Answer : D

10. The most abundant noble gas present in air is
A. neon
B. argon
C. helium
D. krypton
Answer : B

11. A light alloy having high tensile strength is
A. German silver
B. solder
C. magnalium
D. bell metal
Answer : C

12. The compound of iron used in the manufacture of blue-black ink is
A. ferric chloride
B. ferric sulphate
C. ferric thiocyanate
D. ferrous sulphate
Answer : D

13. The addition of a neutron to the nucleus of an atom
A. increases the atomic mass of the atom
B. decreases the atomic mass of the atom
C. increases the charge on the nucleus
D. decreases the charge on the nucleus
Answer : A

14. Calamine is a ore of
A. tine
B. magnesium
C. zinc
D. copper
Answer : C

15. Vinegar is an aqueous solution of
A. oxalic acid
B. citric acid
C. acetic acid
D. hydrochloric acid
Answer : C

16. An element which is preserved under water is
A. Sodium
B. red phosphorus
C. white phosphorus
D. sulphur
Answer : C

17. Real gases tend to become ideal Under
A. low pressure and high temperature
B. low pressure and low temperature
C. high pressure and low temperature
D. high pressure and high temperature
Answer : A

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

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

20. 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

21. The process that takes place in the atom bomb is
A. nuclear' fusion
B. radioactive disintegration
C. nuclear fission
D. chemical decomposition
Answer : C

22. Smelling salt contains
A. ammonium chloride
B. ammonium carbonate
C. ammonium sulphate
D. potassium nitrate
Answer : B

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

24. Annealing of glass is carried out by
A. rapid cooling
B. rapid heating
C. slow cooling
D. slow heating
Answer : C

25. Ethyl alcohol is
A. a deliquescent substance
B. an efflorescent substance
C. a hygroscopic substance
D. a dehydrating substance
Answer : C

26. Consider the following statements: Hard water is not suitable for
1) drinking
2) washing clothes with soap
3) use in boilers
4) irrigating crops
Which of these statements are correct?
A. 1 and 3
B. 2 and 3
C. 1, 2 and 4
D. 1, 2, 3 and 4
Answer : D

27. The chemical name of aspirin is
A. acetamide phenol
B. malonyl urea
C. aminosalicylic acid
D. acetyl salicylic acid
Answer : D

28. Heavy water was discovered by
A. TW Richards
B. FW Aston
C. Stas
D. Urey
Answer : D

29. Lunar caustic is
A. calcium sulphate
B. ammonium chloride
C. caustic soda
D. silver nitrate
Answer : D

30. Flint glass contains
A. potassium and lead silicates
B. zinc and barium borosilicates
C. potassium and calcium silicates
D. sodium and calcium silicates
Answer : A

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

32. Which one of the following elements is alloyed with iron to produce steel which can resist high temperatures and also have high hardness and abrasion resistance?
A. Aluminium
B. Chromium
C. Nickel
D. Tungsten
Answer : B

33. An example of stimulant fertilizer is
A. gypsum
B. urea
C. potassium nitrate
D. ammonium phosphate
Answer : A

34. The human body contains about
A. 50% water
B. 10% water
C. 70% water
D. 20% water
Answer : C

35. 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

36. Gases have
A. a definite shape but not volume
B. a definite volume and shape
C. a definite volume but not shape
D. neither definite volume nor shape
Answer : D

37. Heated saw dust catches fire when a drop of concentrated nitric acid is added to it. This is due to
A. dehydration
B. oxidation
C. reduction
D. dehydrogenation
Answer : B

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

39. The first organic compound prepared in the laboratory was
A. acetic acid
B. chloroform
C. urea
D. methane
Answer : C

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

41. 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

42. Methylated spirit is a mixture of
A. methyl alcohol and acetic acid
B. methyl alcohol and ethyl alcohol
C. ethyl alcohol and pyridine
D. methyl alcohol and pyridine
Answer : B

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

44. Invar, used for making pendulums is an alloy of steel with
A. tungsten
B. nickel
C. manganese
D. chromium
Answer : B

45. Dry Ice is
A. solid carbon dioxide
B. liquid oxygen
C. liquid hydrogen
D. liquid. Chlorine
Answer : A

46. The discoverer of chloroform was
A. Liebig
B. Pasteur
C. Bunsen
D. Erlenmeyer
Answer : A

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

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

49. Plastics are synthetic
A. rubbers
B. fibres
C. resins
D. sugars
Answer : C

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