124. Smelling salt contains
(a) ammonium chloride
(b) ammonium carbonate
(c) ammonium sulphate
(d) potassium nitrate
Ans: (b)
125. Which of the following act a both u oxidising and reducing agent?
(a) nitric acid
(b) ammonia
(c) nitrous acid
(d) nitrogen peroxide
Ans: (c)
126. Compounds of nitrogen with metals are called
(a) nitrates
(b) nitrites
(c) hyponitrates
(d) nitrides
Ans: (d)
127. Laughing gas is
(a) nitric oxide
(b) nitrogen peroxide
(c) nitrogen pentoxide
(d) nitrous oxide
Ans: (d)
128. Heated saw dust catches fire when a drop of concentrated nitric acid is added to it. This is due to
(a) dehydration
(b) oxidation
(c) reduction
(d) dehydrogenation
Ans: (b)
129. Nitrous oxide used as anaesthetic is usually mixed with
(a) ethyl alcohol
(b) chloroform
(c) oxygen
(d) methyl alcohol
Ans: (c)
130. The earliest name given to nitrogen was
(a) dephlogisticated air
(b) azote
(c) inflammable air
(d) marine acid air
Ans: (b)
131. The gas which has a faint sweet odour is
(a) nitrogen
(b) nitrous oxide
(c) nitric oxide
(d) nitrogen peroxide
Ans: (b)
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