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The compound (X) on heating gives a colourless gas and a residue that is dissolved in water to obtain (B). Excess of CO2 is bubbled through aqueous solution of B, C is formed. Solid (C) on heating gives back X. (B) is ……(a) CaCO3 (b) Ca(OH)2 (c) Na2CO3 (d) NaHCO3 |
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Answer» (b) Ca(OH)2 CaCO3 \(\overset{\Delta}{\longrightarrow}\) CaO + CO2 CaO + H2O → Ca(OH)2 Ca(OH)2 + CO2 → CaCO3 + H2O |
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