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When washing soda is heated...

When washing soda is heated

A

CO is released

B

`CO+CO_(2)` is released

C

`CO_(2)` is released

D

Water vapour is released

Text Solution

Verified by Experts

The correct Answer is:
D
Washing soda is sodium carbonate decahdrate `(Na_(2)CO_(2).10H_(2)O)`. It is an efforescent substance i.e. give out nine water molecules of crystallization on keeping in air.
`Na_(2)CO_(3).10H_(2)Ooverset(??)(to)underset("sodium hydrated")(Na_(2)CO_(3).H_(2)O)+9H_(2)O`
But on heating it losses all water molecules to form anhydrous sodium carbonate or soda ash
`Na_(2)CO_(2).10H_(2)Ooverset(Delta)(to)underset("??")(Na_(2)CO_(2))+10H_(2)O`
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