Which gas released from bleaching powder is primarily responsible for its bleaching and disinfecting action?
Chlorine (Cl2)
Bleaching powder is calcium oxychloride, CaOCl2, made by passing chlorine over dry slaked lime.
It reacts with dilute acids, or slowly with carbon dioxide in the air, to release chlorine gas. Chlorine, together with the oxidising species it forms in water, bleaches colours and kills germs.
Hence, the answer is Chlorine (Cl2).
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Important Questions from Chemistry in Everyday Life
Consider the following statements and select the correct option.
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Which of the following statement(s) about the artificial sweeterning agents is/are TRUE?
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