76. Which is also known as ‘paraffin oil’?
(a) Petrol (b) Diesel
(c) Kerozene (d) Naphta
Answer: (c)
77. Gottileb Daimler invented
(a) Petrol engine (b) Diesel engine
(c) Carburettor (d) Jet Engine
Answer: (c)
78. The temperature at which
it will continue to bum for at least fiveseconds after ignition by an open
flame is called:
(a) fire point (b) flash
point
(c) Autoignition point (d) Octane number
Answer: (a)
79. The Basel Convention is
related to:
(a) Hazardous Wastes (b) War
Prisoners
(c) Nuclear Weapons (d) Drugs
Answer: (a)
80. What is known as
‘king of chemicals’?
(a) Hydrochloric acid (b) Sulphuric acid
(c) Nitric acid
(d) Acetic
acid
Answer: (b)
81. The acid present in
eye lotion:
(a) Citric acid
(b) Boric
acid
(c) Nitric acid (d) Carbolic acid
Answer: (b)
82. Which vitamin is
also known as Ascorbic acid?
(a) Vitamin A (b) Vitamin C
(c) Vitamin D (d) Vitamin E
Answer: (b)
83. The gas used by
plants to respire during day time:
(a) C02
(b) Methane
(c) Nitrogen (d) Oxygen
Answer: (d)
84. The gas used in
factories to make Soda Water
(a) Carbon Dioxide (b) Ozone
(c) Ammonia (d) Helium
Answer: (a)
85. The second least
dense metal:
(a) Potassium (b) Sodium
(c) Aluminium (d) Lithium
Answer: (a)
86. The hardest metal:
(a) iron (b) Iridium
(c) Chromium (d) Tungsten
Answer: (c)
87. Metal
that is the best conductor of heat:
(a) Iron
(b) Gold
(c) Silver
(d) Copper
Answer: (c)
88. Stibnite
is the ore of:
(a) Antimony (b) Lead
(c) Tin (d) Zinc
Answer: (a)
89. Ore of
chromium:
(a) Chromite (b) Nichrome
(c) Wolfram (d) Sphalerite
Answer: (a)
90. Magnesium silicate is:
(a) Soda ash (b) Quartz
(c) Potash (d) Talc
Answer: (d)
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