Question:
A compound \( X \) on heating gives a colourless gas. The residue is dissolved in water to obtain \( Y \). Excess \( CO_2 \) is passed through aqueous solution of \( Y \) when \( Z \) is formed. \( Z \) on gentle heating gives back \( X \). The compound \( X \) is
A compound \( X \) on heating gives a colourless gas. The residue is dissolved in water to obtain \( Y \). Excess \( CO_2 \) is passed through aqueous solution of \( Y \) when \( Z \) is formed. \( Z \) on gentle heating gives back \( X \). The compound \( X \) is
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The decomposition of calcium bicarbonate leads to calcium carbonate, which can be re-dissolved and react with \( CO_2 \).
Updated On: Jan 12, 2026
- \( Ca(HCO_3)_2 \)
- \( CaCO_3 \)
- \( Na_2CO_3 \)
- \( Na_2CO_3 \)
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The Correct Option is A
Solution and Explanation
The compound \( X \) is \( Ca(HCO_3)_2 \), which on heating decomposes to form calcium carbonate and carbon dioxide, and the reaction steps match with the given description.
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