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Question: Answered & Verified by Expert
A hydrated solid X on heating initially gives a monohydrated compound Y. Y upon heating above 373 K leads to an anhydrous white powder Z. X and Z, respectively, are;
Chemistrys Block ElementsJEE MainJEE Main 2019 (10 Apr Shift 2)
Options:
  • A washing soda and soda ash.
  • B baking soda and soda ash.
  • C washing soda and dead burnt plaster.
  • D baking soda and dead burnt plaster.
Solution:
2749 Upvotes Verified Answer
The correct answer is: washing soda and soda ash.
'X' is washing soda Na2CO3.10H2O which on heating gives a monohydrate Na2CO3.H2O. The monohydrate on further heating gives an anhydrous residue of Na2CO3



X  and  Z are washing soda and soda ash.

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