12th class (Fsc) Chemistry unit 5 MCQs
76. The anhydride HCIO4 is:
a. CI2O5
b. CIO3
c. CI2O7
d. CIO2
77. Bleaching powder may be produce, by passing chlorine ocer:
a. Anhydrous calcium sulphate
b. Calcium carbonate
c. Calcium hydroxide
d. Hydrated calcium sulphate
78. Fungicides are the pesticides which:
a. Kill plants
b. Control the growth of fungus
c. Kill herbs
d. kill insects
79. Silver bromide is used in:
a. Ceramics
b. Paints
c. Gasoline
d. Photography
80. Which of the following is used as non stock coating for cooking pans?
a. Argon
b. Teflon
c. Krypton
d. Freon
81. The halogens present in teflon is:
a. Chlorine
b. Iodine
c. Bromine
d. Fluorine
82. Which of the gas is used in bacterial lamps:
a. Xenon
b. Neon
c. Chlorine
d. Fluorine
83. In nuclear reactors, the cooling medium is provided by:
a. Xenon
b. Helium
c. Radon
d. Neon
84. Xenon has kinds of oxides:
a. 4
b. 2
c. 1
d. 3
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