Chlorine gas reacts with red hot calcium oxide to give:

bleaching powder and dichlorine monoxide

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bleaching powder and water

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calcium chloride and chlorine dioxide

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calcium chloride and oxygen

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Solution

The correct option is D calcium chloride and oxygen
Chlorine gas reacts with red hot calcium oxide to give calcium chloride and oxygen gas.

$2 C a O + 2 {C l}_{2} r e d h o t - ----- \to 2 C a {C l}_{2} + O_{2} ↑$

Hence, option $D$ is correct.

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