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)
No comments:
Post a Comment