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A hydrated solid X on heating initally g...

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

A

Baking soda and soda ash

B

Washing soda and dead burnt plaster

C

Baking soda and dead burnt plaster

D

Washing soda and soda ash

Text Solution

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The correct Answer is:
To solve the problem, we need to identify the hydrated solid X, the monohydrated compound Y, and the anhydrous white powder Z based on the heating process described. ### Step-by-Step Solution: 1. **Identify the Hydrated Solid (X)**: - The problem states that we have a hydrated solid X that on heating gives a monohydrated compound Y. A well-known hydrated compound that fits this description is washing soda, which is sodium carbonate decahydrate (Na2CO3·10H2O). 2. **Heating X to form Y**: - When washing soda (Na2CO3·10H2O) is heated, it loses water molecules. The first stage of heating results in the formation of a monohydrated compound, which is sodium carbonate monohydrate (Na2CO3·H2O). This is our compound Y. 3. **Heating Y to form Z**: - The next part of the question states that Y (Na2CO3·H2O) upon further heating above 373 K leads to an anhydrous white powder Z. When sodium carbonate monohydrate is heated above 373 K, it loses the remaining water molecule and forms anhydrous sodium carbonate (Na2CO3), which is the white powder Z. 4. **Conclusion**: - Therefore, we can summarize the compounds as follows: - X (hydrated solid) = Na2CO3·10H2O (Washing Soda) - Y (monohydrated compound) = Na2CO3·H2O (Sodium Carbonate Monohydrate) - Z (anhydrous white powder) = Na2CO3 (Soda Ash) ### Final Answer: - X = Washing Soda (Na2CO3·10H2O) - Y = Sodium Carbonate Monohydrate (Na2CO3·H2O) - Z = Soda Ash (Na2CO3)

To solve the problem, we need to identify the hydrated solid X, the monohydrated compound Y, and the anhydrous white powder Z based on the heating process described. ### Step-by-Step Solution: 1. **Identify the Hydrated Solid (X)**: - The problem states that we have a hydrated solid X that on heating gives a monohydrated compound Y. A well-known hydrated compound that fits this description is washing soda, which is sodium carbonate decahydrate (Na2CO3·10H2O). 2. **Heating X to form Y**: ...
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