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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

Washing soda and Soda ash

B

Baking soda and dead burnt plaster.

C

Washing soda and dead burnt plaster

D

baking 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 and the anhydrous white powder Z based on the information given in the question. ### Step 1: Identify the hydrated solid X The question states that a hydrated solid X on heating gives a monohydrated compound Y. A common example of a hydrated compound is washing soda, which is sodium carbonate decahydrate (Na2CO3·10H2O). ### Step 2: Heating X to form Y When washing soda (Na2CO3·10H2O) is heated, it loses water to form a monohydrated compound Y, which is sodium carbonate monohydrate (Na2CO3·H2O). ### Step 3: Heating Y to form Z Next, the question states that Y (Na2CO3·H2O) upon heating above 373 K leads to an anhydrous white powder Z. When sodium carbonate monohydrate (Na2CO3·H2O) is heated above 373 K, it loses its remaining water and forms anhydrous sodium carbonate (Na2CO3), which is a white powder. ### Step 4: Conclusion Based on the above steps, we can conclude that: - X is washing soda (Na2CO3·10H2O) - Z is anhydrous sodium carbonate (Na2CO3) ### Final Answer: X and Z respectively are: - X: Na2CO3·10H2O (Washing Soda) - Z: Na2CO3 (Soda Ash)
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