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    Question

    Tear gas used by the police to disperse the mob contains

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    A carbon dioxide Correct Answer Incorrect Answer
    B chlorine Correct Answer Incorrect Answer
    C ammonia Correct Answer Incorrect Answer
    D hydrogen sulphide Correct Answer Incorrect Answer

    Solution

    Tear gas is a compound. Each molecule of tear gas contains one atom of chlorine. 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.

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