Quiznetik

Chemistry | Set 1

1. What is "milk of magnesia" chemically?

Correct : D. Magnesium hydroxide

2. Milk tastes sour when kept in the open for sometime due to the formation of –

Correct : A. lactic acid

3. Which of the following is a natural dye?

Correct : C. Alizarin

4. The ratio of pure gold in 18 carat gold is

Correct : B. 75%

5. is the process in which acids and bases react to form salts and water.

Correct : A. Neutralization

6. The gas usually causing explosions in coal mines is –

Correct : D. Methane

7. Which is the purest form of iron?

Correct : D. Wrought iron

8. Which of the following metals form an amalgam with other metals?

Correct : D. Mercury

9. Petroleum is a mixture of –

Correct : B. hydrocarbons

10. The gas used for filling weather balloons is –

Correct : A. helium

11. An emulsion is a colloid of a –

Correct : B. liquid in a liquid

12. Percentage of carbon in steel ranges from –

Correct : A. 0.1 to 1.5

13. Which of the following gases makes bread or cake rise making them soft and spongy?

Correct : C. CO2

14. Candle is a mixture of –

Correct : A. Paraffin wax and stearic acid

15. German silver, an alloy, does not contain the metal –

Correct : D. Silver

16. Oxygen which is vital for life is a product of photosynthesis and comes from –

Correct : C. water

17. What is the purpose of adding baking soda to dough?

Correct : D. To generate carbon dioxide

18. Gobar gas mainly contains –

Correct : D. Methane

19. The chief constituent of vinegar is –

Correct : B. Acetic acid

20. Commercial Vaseline is derived from -

Correct : D. petroleum

21. Colour imparted to the Bunsen flame by strontium salt is -

Correct : D. crimson red

22. Name the particle that is most essential to continue the chain reaction during the fission of uranium -

Correct : C. Neutron

23. Which one amongst the following is not a Green House gas?

Correct : A. Nitrogen

24. The element used in the manufacture of safety matches is –

Correct : A. Phosphorous

25. The main source of Naphthalene is -

Correct : C. Coal-tar

26. The material used in solar cells contains

Correct : B. Silicon

27. Quartz is a crystalline form of -

Correct : C. Silica

28. In vulcanisation process, rubber can be hardened by adding -

Correct : C. Sulphur

29. Urea is a -

Correct : C. Nitrogenous fertilizer

30. During inter conversion of energy from one form to other forms, total energy at any time remains–

Correct : A. constant

31. Which of the following is a physical change?

Correct : C. sublimation

32. Sea weeds are important source of –

Correct : D. iodine

33. Which gas is used to manufacture vanaspati from vegetable oil is -

Correct : D. hydrogen

34. The pH of a neutral solution is -

Correct : B. 7

35. The nucleus of an atom consists of -

Correct : C. protons and neutrons

36. Detergents are –

Correct : B. Sodium salts of sulphonic acids

37. The noble gas used in radiotherapy is

Correct : C. radon

38. Ethanol containing 5% water is known as –

Correct : A. rectified spirit

39. The important ore of aluminium is –

Correct : A. bauxite

40. Which of the following is not present in German-silver?

Correct : C. Silver

41. The major harmful gas emitted by automobile vehicles which causes air pollution is –

Correct : A. Carbon Monoxide

42. Who discovered the atom bomb?

Correct : C. Otto Hahn

43. The major component of honey is -

Correct : D. fructose

44. A body moving in a circular path with a constant speed has a -

Correct : C. constant kinetic energy

45. is a multibranched polysaccharide of glucose that serves as a form of energy storage in animals and fungi.

Correct : B. Glycogen

46. Potassium Permanganate is used for purifying drinking water, because -

Correct : C. It is an oxidising agent

47. Diamond is harder than graphite because of –

Correct : A. difference in layers of atoms

48. Gobar gas contains mainly –

Correct : A. methane

49. What is the most commonly used substance in fluorescent tubes?

Correct : C. Mercury vapour and argon

50. Which of the following is a super-cooled liquid?

Correct : C. Glass

51. Soap is prepared by boiling caustic soda with –

Correct : D. Fats

52. Bronze is an alloy of –

Correct : C. Copper and Tin

53. Which of the following elements is non- radioactive?

Correct : D. Zirconium

54. The gas used for artificial fruit ripening of green fruit is –

Correct : A. Ethylene

55. Manganite is an ore/mineral of             .

Correct : C. Manganese

56. The presence of which of the following salts in water causes corrosion in steam boilers?

Correct : B. Magnesium Chloride

57. The freezing point of fresh water is -

Correct : A. 0°C

58. is used for making vinegar.

Correct : D. Acetic acid

59. Which of the following elements replaced eka-Aluminium in Mendeleev's Periodic Table?

Correct : B. Gallium

60. The most reactive among the halogens is -

Correct : A. Fluorine

61. Which one of the following organic compounds has fruity smell?

Correct : C. Ester

62. What material is used to make electric heater coil?

Correct : D. Nichrome

63. Which one of the following is a major green gas?

Correct : A. Carbon dioxide

64. Pasteurisation is the process in which milk is heated to –

Correct : C. 63°C for 30 minutes

65. What is the maximum Water Vapour content in the atmosphere?

Correct : B. 3 to 4 per cent

66. Steel contains –

Correct : A. 0.1 - 2% carbon

67. The chemicals most commonly used for cloud seeding or artificial rainmaking' is/are

Correct : A. Silver Iodide

68. The Refrigerant 'FREON' is –

Correct : B. Difluoro Dichloro Methane

69. is the number of shells for elements of the 3rd period.

Correct : C. "0"

70. Which one among the following polymers is used for making bullet-proof material?

Correct : C. Polyethylene

71. The isotope of Uranium capable of sustaining chain reaction is -

Correct : A. U-235

72. Conversion of chemical energy into electrical energy occurs in -

Correct : C. A battery

73. The fuel that is used in modern submarines is –

Correct : A. Nuclear fuel

74. When lime juice is dropped on baking soda, brisk effervescence takes place because the gas evolved is -

Correct : C. Carbon dioxide

75. The basic chemical building block of natural rubber obtained from trees is –

Correct : A. Isoprene

76. Hydrogen was discovered by -

Correct : A. Cavendish

77. Glass is a –

Correct : B. supercooled liquid

78. Uranium eventually decays into a stable isotope of —

Correct : C. Lead

79. The substance that is added to make natural rubber strong and more bouncy is –

Correct : C. Sulphur

80. White phosphorus is always kept under

Correct : D. water

81. The amount of Chlorine available in water after disinfection is called as –

Correct : B. residual chlorine

82. What are the major pollutants of cigarette smoke?

Correct : B. Carbon monoxide and nicotine

83. The chemical name of 'Common salt' is

Correct : A. Sodium chloride

84. By-product obtained by soap industry is –

Correct : B. Glycerol

85. Polythene is polymer of –

Correct : A. Ethylene

86. Who suggested that the most of the mass of atom is located in nucleus?

Correct : C. Rutherford

87. Electromagnet is constructed with which of the following?

Correct : B. Soft Iron

88. Which one of the following is a cation?

Correct : C. Ammonium

89. Ginger is an example of -

Correct : C. Modified Stem

90. The ore which is found in abundance in India is -

Correct : A. monazite

91. Baryllium Sulphate is less soluble in water due to –

Correct : A. High inflammable energy

92. Which of the following is a not a green house gas?

Correct : C. Carbon Monoxide

93. Heat resistant variety of glass is –

Correct : C. Flint glass

94. Among the following iron ores, the highest percentage of iron content is found in—

Correct : A. Haemetite

95. For determination of the age of which among the following is carbon dating method used?

Correct : D. 1 & 2 above

96. The natural source of hydro-carbon is –

Correct : A. Crude oil

97. Which of the following is chiefly present in LPG (Liquefied Petroleum Gas)?

Correct : D. Butane

98. Which one of the following metals is used to galvanise iron?

Correct : C. Zinc

99. Which of the following is not a precious/semi-Precious stone?

Correct : C. Pearl

100. What is the name of that system, which uses radioactivity to decide the period of materials of-prehistoric period?

Correct : C. Carbon dating