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Ram Sharma • 188.81K Points
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(A) hydrogen sulphide
(B) chlorine
(C) ammonia
(D) carbon dioxide
Correct Answer - Option(B)
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Explanation by: Ram Sharma
chlorine.Tear gas is a compound. The compound 2- chlorobenzalmalononitrile, a cyanocarbon, is the defining component of a 'tear gas' commonly referred to as CS gas, which is used as a riot control agent. Each molecule of tear gas contains one atom of chlorine.

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