Chemistry MCQs

Chemistry Mcqs for the preparation of NTS, PPSC, SPSC, BPSC, KPSC, FPSC, OTS and other academic entry test and jobs tests.

1. Why is phosphorus kept under water
(a) to make it durable
(b) to make it wet
(c) to save it from catching fire when exposed to dry air
(d) water forms a protective coating on it

2. Coat is formed due to the process of
(a) Evaporation
(b) Centrifugation
(c) Conjugation
(d) Carbonization

3. Which one of the following is the softest
(a) Iron
(b) Lithium
(c) Iron
(d) Sodium

4. Which of the following has the same atomic number and atomic weight
(a) Hydrogen
(b) Helium
(c) Oxygen
(d) Nitrogen

5. The purest form of iron is
(a) Pig iron
(b) Cast iron
(c) Wrought iron
(d) Stainless steel

6. Rusting of iron requires
(a) Oxygen only
(b) Oxygen and Carbon dioxide
(c) Oxygen and water
(d) Carbon dioxide only

7. Which of the following gases is the most toxic
(a) Carbon dioxide
(b) Carbon monoxide
(c) Sulphur dioxide
(d) Acetic acid

8. Uranium eventually decays into a stable isotope of
(a) Lead
(b) Polonium
(c) Thorium
(d) Radium

9. What is the main component of bio gas and natural gas
(a) Ethane
(b) Butane
(c) Propane
(d) Methane

10. Which among the following elements (metals) pollutes the air of a city having large number of automobiles
(a) Cadmium
(b) Chromium
(c) Lead
(d) Nickel

11. Which of the following elements is found in all organic compounds
(a) Calcium
(b) Carbon
(c) Nitrogen
(d) Oxygen

12. Which of the following is the Chemical name of the salt we use in our kitchen
(a) Sodium Chloride
(b) Ammonium Sulphate
(c) Sodium Carbonate
(d) Calcium Chloride

13. Which gas is used for converting vegetable oils into saturated fats
(a) H2
(b) O2
(c) Cl2
(d) SO2

14. Which of the following gases is used in the cigarette lighters
(a) Butane
(b) Methane
(c) Propane
(d) Radon

15. What is the chemical name of bleaching Powder
(a) Calcium carbonate
(b) Calcium hydrochloride
(c) Calcium phosphate
(d) Calcium cyanamide

Chemistry Mcqs for the preparation of NTS, PPSC, SPSC, BPSC, KPSC, FPSC, OTS and other academic entry test and jobs tests.

16. Which of the following Chemicals is used for fruit ripening
(a) Calcium carbide
(b) Sodium chloride
(c) Potassium chloride
(d) None of the above

17. In the entire universe, what is the most abundant element
(a) Hydrogen
(b) Iron
(c) Lead
(d) Oxygen

18. The single acid which dissolves gold is
(a) Nitric acid
(b) Selenic acid
(c) Hydrochloric acid
(d) Aqua regia

19. The chemical name of quartz is
(a) Calcium oxide
(b) Calcium phosphate
(c) Sodium phosphate
(d) Sodium silicate

20. Marsh gas mainly contains
(a) C2H2
(b) CO
(c) CH4
(d) H2S

21. What is the silk
(a) Fat
(b) Carbohydrate
(c) Hydrocarbon
(d) Protein

22. German Silver is an alloy of
(a) copper:55,nickel:25 and zinc: 20
(b) copper:25 nickel:45 and zinc: 30
(c) copper:25,nickel:55 and zinc: 20
(d) copper:15,nicke1:45 and zinc: 40

23. Which of the following is not a compound of calcium
(a) Gypsum
(b) Marble
(c) Chalk
(d) Silicon

24. Which one of the following is used as a moderator in a nuclear reactor
(a) Radium
(b) Ordinary water
(c) Thorium
(d) Heavy water

25. Alloys in which mercury is one of the metals are called
(a) Amalgams
(b) Emulsions
(c) Mixtures
(d) Solders

26. Diamond is the __________ form of carbon
(a) crystalline
(b) amorphous
(c) chemical
(d) alkaline

27. The atomic weight of uranium is
(a) 234
(b) 238
(c) 226
(d) 242

28. Which of the following is used as laughing gas
(a) Nitrogen trioxide
(b) Nitrogen dioxide
(c) Nitrous oxide
(d) Nitrogen tetroxide

29. Carbon occurs in nature in the purest form as
(a) Diamond
(b) Graphite
(c) Carbon black
(d) Coal

30. Which substance was the first organic chemical to be synthesized from an inorganic source
(a) Urea
(b) Hellenic acid
(c) Hydrochloric acid
(d) Aqua regia

Chemistry Mcqs for the preparation of NTS, PPSC, SPSC, BPSC, KPSC, FPSC, OTS and other academic entry test and jobs tests.

31. What is the Air
(a) Element
(b) Compound
(c) Mixture
(d) Colloid

32. The ore of aluminium metal is
(a) Cuprite
(b) Galena
(c) Bauxite
(d) Zirconite

33. What element is the most electronegative and reactive of all elements
(a) Hydrogen
(b) Chlorine
(c) Fluorine
(d) Oxygen

34. The filament of an electric bulb is made of
(a) Tungsten
(b) Iron
(c) Nichrome
(d) Carbon

35. What element’s three isotopes have different names
(a) Oxygen
(b) Helium
(c) Hydrogen
(d) Carbon

36. Which of these is a noble metal
(a) Gold
(b) Calcium
(c) Magnesium
(d) Zinc

37. What is the PH of water
(a) 9
(b) 6
(c) 7
(d) 8

38. This acid is used in almost all car batteries and is also known as ‘Oil of Vitriol’. Which acid is it
(a) Sulphuric acid
(b) Perchloric acid
(c) Nitric add
(d) Acetic acid

39. Which metal is extracted from hematite
(a) Copper
(b) Iron
(c) Zinc
(d) Potassium

40. What was the first element to be produced artificially
(a) Plutonium
(b) Neptunium
(c) Francium
(d) Technetium

41. What is the name of the pigment that gives the green color to plants
(a) Carotene
(b) Chlorophyll
(c) Phenolphthalein
(d) Xanthophyll

42. The name “copper” is derived from the name of the tiny island country of
(a) Cyprus
(b) Denmark
(c) Greece
(d) Malta

43. Which of the following bases is involved in the making of soap
(a) Baking soda
(b) Caustic soda
(c) Ammonia
(d) Washing soda

44. The most commonly used bleaching agent is
(a) Sodium chloride
(b) Carbon dioxide
(c) Chlorine
(d) Alcohol

45. The development of the ultra microscope makes use of the
(a) Edison effect
(b) Tyndall effect
(c) Brownian motion
(d) Zeeman effect

Chemistry Mcqs for the preparation of NTS, PPSC, SPSC, BPSC, KPSC, FPSC, OTS and other academic entry test and jobs tests.

46. The hardest form of carbon is
(a) Coke
(b) Graphite
(c) Diamond
(d) Charcoal

47. The first metal to be used by man was
(a) Aluminium
(b) Copper
(c) Silver
(d) Iron

48. The most malleable metal is
(a) Platinum
(b) Silver
(c) Iron
(d) Gold

49. The difference between isotopes of an element is due to the presence of a different number of
(a) Protons
(b) Neutrons
(c) Electrons
(d) Photons

50. The major constituent of air is
(a) Nitrogen
(b) Carbon dioxide
(c) Oxygen
(d) Hydrogen

51. The chief constituent of gobar gas (Bio Gas) is
(a) Methane
(b) Ethane
(c) Propane
(d) Chloride

52. The gas used in the manufacture of vanaspati from vegetable oil is
(a) Hydrogen
(b) Oxygen
(c) Nitrogen
(d) Carbon dioxide

53. The most reactive among the halogens is
(a) Bromine
(b) Chlorine
(c) Iodine
(d) Fluorine

54. Which particle of atom has no charge
(a) Proton
(b) Neutron
(c) Electrons
(d) None of these

55. Which are on the outer orbit of an atom
(a) Proton
(b) Neutron
(c) Electrons
(d) None of these

56. Stainless steel is an alloy of
(a) Iron, Carbon and Nickel
(b) Iron and Manganese
(c) Iron, Chromium and Zinc
(d) Iron, Chromium and Nickel

57. Which particle of atom has a positive charge
(a) Proton
(b) Neutron
(c) Electrons
(d) None of these

58. The major component in the LPG is
(a) Butane
(b) Methane
(c) Propane
(d) Ethane

59. The main constituent gas of CNG is
(a) Benzene
(b) Ethane
(c) Methane
(d) Butane

60. Which of the following; is not a chemical action
(a) Burning of coal
(b) Conversation of water into steam
(c) Digestion of food
(d) Burning of paper

Chemistry Mcqs for the preparation of NTS, PPSC, SPSC, BPSC, KPSC, FPSC, OTS and other academic entry test and jobs tests.

61. Chemical name of bleaching powder is
(a) Calcium Chlorate
(b) Calcium Chloro hypochlorite
(c) Calcium hypochlorite
(d) Calcium bi Chloride

62. Which particle of atom has a negative charge
(a) Proton
(b) Neutron
(c) Electrons
(d) None of these

63. Which one of the following is also called Stranger Gas
(a) Xenon
(b) Argon
(c) Neon
(d) Nitrous oxide

64. Which of the following is not a mixture
(a) LPG
(b) Air
(c) Gasoline
(d) Distilled water

65. Which of the following is a fertilizer
(a) Sodium nitrate
(b) Sodium carbonate
(c) Sodium peroxide
(d) Sodium phosphate

66. The main constituent gas of LNG is
(a) Benzene
(b) Ethane
(c) Methane
(d) Butane

67. Which of the following is a chemical change
(a) Evaporation of water
(b) Burning of candle
(c) Glowing of an electric bulb
(d) Liquefaction of air

68. Which of the primary component of natural gas
(a) Methane
(b) Butane
(c) Propane
(d) Ethane

69. The substance used for artificial rain is
(a) Silver Bromide
(b) Silver Iodide
(c) Ammonium Nitrate
(d) All of the above

70. Which of these is not a noble gas
(a) Argon
(b) Hydrogen
(c) Krypton
(d) Neon

71. The most abundant element in the earth’s crust is
(a) Silicon
(b) Aluminium
(c) Nitrogen
(d) Oxygen

72. What will the color of litmus paper turn into when dipped in orange juice
(a) Red
(b) Purple
(c) Blue
(d) Orange

73. Which of the following gases is used in fire extinguishers
(a) Carbon monoxide
(b) Carbon dioxide
(c) Nitrogen oxide
(d) Sulphur dioxide

74. First organic chemical to be synthesized in Laboratory is
(a) Phosphoric Acid
(b) Oxalic Acid
(c) Urea
(d) Citric Acid

75. Which one of the following metals does not react with water to produce Hydrogen
(a) Sodium
(b) Potassium
(c) Lithium
(d) Cadmium

Chemistry Mcqs for the preparation of NTS, PPSC, SPSC, BPSC, KPSC, FPSC, OTS and other academic entry test and jobs tests.

76. Which of the following is a polymer
(a) Vinyl Chloride
(b) Urea
(c) Starch
(d) Styrene

77. What is the only element that normally has no neutrons
(a) Oxygen
(b) Hydrogen
(c) Krypton
(d) Neon

78. Which of these is liquid at room temperature
(a) Chlorine
(b) Oxygen
(c) Iodine
(d) Bromine

79. Due to rusting the weight of iron
(a) Increases
(b) Decreases
(c) Remains the same
(d) Uncertain

80. Which of these metals has the highest density
(a) Platinum
(b) Lithium
(c) Tungsten
(d) Iridium

81. In nature, this gas is only ever found combined with other elements. In its pure state however, it is fatal if inhaled.
(a) Argon
(b) Oxygen
(c) Chlorine
(d) Hydrogen

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