Quiznetik

Chemistry | Set 5

1. Tar roads get damaged if there is –

Correct : A. stagnation of water on road

2. The drug 'Marijuana' is a –

Correct : A. sedative

3. Chemically 'Quick Silver’ is known as

Correct : A. Mercury

4. Extensively used nitrogenous fertilizer is –

Correct : B. Urea

5. The metal used in storage batteries-

Correct : C. Lead

6. Type metal used in printing press is an alloy of -

Correct : B. lead and antimony

7. The acid which is secreted by the glands in the stomach wall is –

Correct : B. hydrochloric acid

8. Dry ice is –

Correct : D. solid carbon dioxide

9. Cement containing excess amount of lime –

Correct : A. cracks during setting

10. Which one of the following is a micro- element?

Correct : A. Chlorine

11. In vulcanization, natural rubber is heated with-

Correct : B. Sulphur

12. An example of major air pollutant is –

Correct : B. Carbon monoxide

13. The metal, used to galvanise iron to protect it from rusting is -

Correct : A. Zine

14. Which of the following gases is mixed with oxygen for breathing by divers in aqualungs?

Correct : B. Nitrogen

15. The material known in commerce as Terylene is a –

Correct : A. Synthetic fibre

16. Among the fuels given below, the one with highest calorific value is –

Correct : D. Natural gas

17. Electric bulbs are filled with –

Correct : C. Argon

18. The purest form of Iron is :

Correct : D. Wrought iron

19. Which of the following metals are present in hemoglobin and chlorophyll, respectively?

Correct : A. Fe and Mg

20. Atomic mass of Nitrogen is 14 and that of Hydrogen is 1. What will be the molecular mass of Ammonia?

Correct : B. 17

21. Silver halides are used in photographic plates because they are -

Correct : C. reduced by light

22. Tetra ethyle lead (TEL) is -

Correct : D. an antiknock compound

23. Which metal is heaviest -

Correct : A. osmium

24. The term PVC used in the plastic industry stands for -

Correct : A. polyvinyl chloride

25. Rusting of iron takes place due to –

Correct : A. oxidation

26. German silver used for making utensils is an alloy of –

Correct : B. Copper, zinc, nickel

27. Sour milk contains –

Correct : D. lactic acid

28. The acid used in lead storage cells is –

Correct : D. sulphuric acid

29. Milk is an example of -

Correct : C. emulsion

30. Wood Spirit is which of the following?

Correct : C. Methyl Alcohol

31. Alum stops bleeding in minor cuts because of –

Correct : D. coagulation

32. 'Plaster of Paris' is made by partial dehydration of –

Correct : B. gypsum salt

33. The purity of gold is expressed in carats. The purest form of gold is–

Correct : A. 24 carats

34. Petroleum consists of a mixture of –

Correct : C. Hydrocarbons

35. What is a mixture of potassium nitrate powdered charcoal and sulfur called?

Correct : D. gun powder

36. What among following is used to produce artificial rain?

Correct : C. silver iodide

37. The isotope used for the production of atomic energy is -

Correct : A. U-235

38. Which of the following is not a nucleon?

Correct : D. Positron

39. Which of the metallic ions is essential for blood clotting?

Correct : B. Ca++

40. CuO + H2 = Cu + H2O. This equation is an example of -

Correct : D. Redox

41. The gas that is used in the manufacture of vanaspati ghee is -

Correct : C. Hydrogen

42. The anode of a dry cell is made up of -

Correct : C. Zine

43. The chemical used in enabalining biological materials is –

Correct : A. formaldehyde in water

44. Which of the following is a mono- atomic gas?

Correct : B. Neon

45. Among the following, which is always found in free-state in nature?

Correct : A. Gold

46. In a nuclear reactor the material use for absorbing neutrons is –

Correct : D. cadmium

47. Solder metal is an alloy of –

Correct : A. lead and tin

48. Ozone depletion in the atmosphere is mainly caused by -

Correct : D. chlorofluorocarbon

49. All noble gases are -

Correct : C. Colourless and Odourless

50. Which halide is used in making sensitive emulsion on photographic film?

Correct : B. Silver bromide

51. Among the following the hardest metal is –

Correct : D. Tungsten

52. Hardest allotrope of carbon is -

Correct : A. diamond

53. The depletion of ozone layer is due to -

Correct : A. chloro fluoro carbon

54. Sodium bicarbonate is commercially known as –

Correct : B. Baking soda

55. Coal is formed from –

Correct : D. compressed and hardened biomass

56. An example of semiconductor is -

Correct : B. Germanium

57. Non-stick kitchenwares are coated with

Correct : C. Teflon

58. ‘Freon' used as refrigerants is chemically known as -

Correct : C. chlorofluoro hydrocarbon

59. The material used in the manufacture of lead pencil is –

Correct : A. Graphite

60. If all bullets could not be removed from gun shot injury of a man, it may cause poisoning by –

Correct : B. Lead

61. Nail polish remover contains?

Correct : C. acetone

62. Which of the following metals is NOT obtained by reduction using carbon?

Correct : B. Sodium

63. One of the following is used to dissolve noble metals. That is –

Correct : D. Aqua ragia

64. Water can be separated from alcohol water mixture by –

Correct : C. distillation

65. 'Milk Sugar' is –

Correct : A. Lactose

66. Which of the following is not a nitrogenous fertilizer?

Correct : D. Superphosphate

67. Which of the following is chief source of Naphthalene?

Correct : C. Tar Camphor

68. Which of the following is the petroleum wax?

Correct : C. Paraffin wax

69. Which variety of coal contains recognizable traces of the original plant material?

Correct : C. Peat

70. Sodium calcium silicate is called.

Correct : C. Soft glass

71. A gas used as a disinfectant in drinking water is -

Correct : D. Chlorine

72. Who developed atom bomb?

Correct : B. J. Robert Openheimer

73. The major harmful gas emitted by automobile vehicle which causes air pollution is –

Correct : A. Carbon Monoxide

74. Humburger effect is otherwise known as-

Correct : C. Choloride shift

75. The purest form of water in nature is –

Correct : A. Rain water

76. The element used for making solar cells is -

Correct : D. Silicon

77. What is the number of atoms constituting a molecule known as -

Correct : D. Atomicity

78. If water smells bad, then that odour can be removed by adding -

Correct : C. activated carbon

79. Substance used as an anti-freeze in radiators of automobiles is :

Correct : A. Methyl alcohol and H2O

80. The function of sedimentation tank in sewage treatment is to:

Correct : D. Remove suspended solids

81. Wich of the following is a method/process of disposing of solid waste which cannot be re-used or recycled?

Correct : D. An the above

82. The weight of 6.023 x 1022 atoms of carbon is –

Correct : A. 12 gms

83. Sulphur dioxide bleaches colouring matter by –

Correct : A. Reduction

84. Which of the following elements is not radioactive?

Correct : C. Zirconium

85. KMnO4 can be used as –

Correct : D. Disinfectant

86. A thick paste of cement, sand and water is called –

Correct : C. Mortar

87. Which one of the following metals pollutes the air of a city having large number of automobiles?

Correct : C. Lead

88. `Milk of Magnesia' is a suspension of –

Correct : C. magnesium hydroxide

89. Pollutant from motor car exhaust that causes mental disease is –

Correct : A. Lead

90. The total energy of revolving electron in an atom –

Correct : C. can never be positive

91. The chief source for the production of nitrogeneous fertilizers is :

Correct : A. Ammonia

92. Zn + 2 HCl = H2 + ZnCl, is an example of which type of reaction?

Correct : C. Single displacement reaction

93. Which of the following is not a natural polymer?

Correct : D. Teflon

94. Vulcanized rubber contains sulphur –

Correct : B. 3-5%

95. Which of the following is a metallic ore?

Correct : D. Galena

96. The first organic compound synthesized in the laboratory was -

Correct : A. Urea

97. The green colour seen in firework displays is due to the chloride salt of–

Correct : C. Barium

98. The radiation that can penetrate deepest in our body –

Correct : D. Gamma-particles

99. Which adioactive pollutant has recently drawn the attention of the public due to its occurrence in the building materials?

Correct : C. Thorium

100. Chemical properties of isotopes –

Correct : A. must be same