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Wednesday 2 March 2016

General Science Chemistry- 5

61. Sir Humphry Davy discovered:
(a) Helium    (b) Hydrogen
(c) Sodium  (d) Oxygen
Answer: (c)

62. A natural fertilizer:
(a) Urea                  (b) Ammonium Nitrate
(c) Compost           (d) Ammonium Nitrate
Answer: (c)


63. Which metal is not used as electromagnet?
(a) Iron         (b) Copper
(c) Nickel     (d) Cobalt
Answer: (b)

64. Radium is chemically similar to:
(a) Calcium           (b) Hydrogen
(c) Helium             (d) Iron
Answer: (a)

65. Which is used as eye wash?
(a) Hydrocyanic acid            (b) Boric acid
(c) Tannic acid                       (d) Citric acid
Answer: (b)

66. Commercial Vaseline is derived from :
(a) Plant gums              (b) Coaltar
(c) Wool wax                (d) Petroleum
Answer: (d)


67. The process involving in making soap is:
(a) Saponification          (b) Hydrolysis
(c) Condensation            (d) Polymerisation
Answer: (a)

68. Neoprene, a synthetic rubber, is made from:
(a) Dichloroethane                               (b) 2-Chlorobutadiene
(c) Carboxy- Methyl Cellulose           (d) Methanol
Answer: (b)

69. The second mostabundant gas in the atmosphere of the Earth:
(a) Oxygen        (b) Argon
(c) C02              (d) Hydrogen
Answer: (a)


70. Kerosene was discovered in 1853 by:
(a) Humphrey Dewey                 (b) Faraday
(c) Kekule                                       (d) Abraham Gesner
Answer: (d)

71. The poisonous gas emitted from the engines of two wheelers:
(a) Phosgene                                       (b) Chlorine
(c) Carbon Monoxide                        (d) Methyl Iso Cyanate
Answer: (c)

72. The only substance in that exists in nature in three forms­ solid, liquid and gas:
(a) Water                                     (b) Coal
(c) Dry ice                                      (d) Urea
Answer: (a)

73. Purest form of water
(a) River water                                (b) Sea water
(c) Pond water                                (d) Rain water
Answer: (d)

74. Element present in DNA and RNA:
(a) Sulphur                            (b) Iron
(c) Calcium                             (d) Phosphorus
Answer: (d)

75. The chemical that causes acid rain:
(a) Sulphur dioxide                       (b) Silver iodide
(c) Silver bromide                          (d) Ozone
Answer: (a)

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