Chemistry Page-10

91) Atomic weight of uranium is
(A) 237
(B) 238
(C) 226
(D) 242

92) Which among the following liquid state at normal temperature?
(A) Mercury
(B) Sodium
(C) Phosphorus
(D) None of these

93) Which of the following gas is used in cigarette lighters?
(A) Butane
(B) Methane
(C) Propane
(D) Radon

94) Liquefied petroleum gas (LPG) consists of
(A) Butane and propane
(B) Ethane and hexane
(C) Ethane and nonane
(D) None of these

95) Which of the following is fire resistant?
(A) Asbestos
(B) Gypsum
(C) Dolomite
(D) None of these

96) Which of the following is used for silvering of mirrors?
(A) Silver oxide
(B) Zinc nitrate
(C) Silver nitrate
(D) Pitchblende

97) Raw materials used for manufacture of glass are
(A) Sand/soda/limestone
(B) Sand/charcoal/soda
(C) Limestone/charcoal/sulphur
(D) Sand/sulphur/soda

98) Solder is an alloy of
(A) Tin and lead
(B) Tin and zinc
(C) Zinc and lead
(D) Zinc and copper

99) Why does milk curdle?
(A) Fermentation of lactose
(B) Reaction of microbes
(C) Overheating
(D) Fungus growth

100) Which of the following is the lightest gas?
(A) Nitrogen
(B) Hydrogen
(C) Ammonia
(D) Carbon dioxide

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