A hydrated solid X on heating initially gives a monohydrated compound Y. Y upon heating above 373K leads to an anhydrous white powder Z. X and Z, respectively, are:

Engineering

Chemistry

Compounds of Alkali Metals

Heating Effect of Compounds

Question

A hydrated solid X on heating initially gives a monohydrated compound Y. Y upon heating above 373K leads to an anhydrous white powder Z. X and Z, respectively, are:

Baking soda and soda ash.

Washing soda and soda ash.

Baking soda and dead burnt plaster.

Washing soda and dead burnt plaster.

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$\underset{\begin{matrix} washin soda \\ (X) \end{matrix}}{{Na}_{2} {CO}_{3} . 10 H_{2} O (s)} \overset{Δ}{\to} \underset{(Y)}{{Na}_{2} {CO}_{3} . H_{2} O} \to_{Δ}^{T > 373 k} \underset{\begin{matrix} (soda ash) \\ (Z) \end{matrix}}{{Na}_{2} {CO}_{3}}$