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An element A reacts with water to form a...

 An element A reacts with water to form a compound B which is used in white washing. The compound B on heating forms an oxide C which on treatment with water gives back B. Identify A, B and C and give the reactions involved. 

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To solve the question, we need to identify the elements and compounds involved in the reactions described. Let's break it down step by step. ### Step 1: Identify Element A The question states that element A reacts with water to form a compound B. The compound B is used in whitewashing. - **Element A**: Calcium (Ca) is known to react with water. ### Step 2: Identify Compound B ...
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