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X and Y are sodium compounds. X is white crystalline solid on heating to 373K gives a white amorphous solid Y and liberates colourless , odour less gas (Z). Identify incorrect statement?

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Z when passed into saturated solution of Y, X is formed

X is sparingly soluble in water

Y is soluble in water

Aqueous solution of Y on heating with Ca(OH)₂ gives X

answer is D.

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Detailed Solution

X = NaHCO₃ ; Y = Na₂CO₃ ; Z = CO₂

Na₂CO₃ + Ca(OH)₂ $\underset{∆}{\to}$ CaCO₃ + 2 NaOH

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