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A salt 'A' on heating forms the oxide of...

A salt 'A' on heating forms the oxide of the metal 'B' and a gas 'C'. 'B' is used in white washing . When C is passed through water it forms 'D'. Identify A, B, C and D. Justify the usage of 'C' for the above purpose.

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To solve the problem step by step, we need to identify the substances A, B, C, and D based on the information provided. ### Step 1: Identify Salt 'A' The question states that a salt 'A' on heating forms the oxide of the metal 'B' and a gas 'C'. Given that 'B' is used in whitewashing, we can deduce that 'B' is calcium (Ca), which is used to produce calcium oxide (CaO) for whitewashing. The salt that contains calcium and can decompose upon heating is calcium carbonate (CaCO₃). **So, A = Calcium Carbonate (CaCO₃)** ...
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