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A compound X of sodium forms a white po...

A compound X of sodium forms a white powder .It is a consituent of baking powder and used in some antacids .when heated it gives a compound Y which is anhydrous and absorbs water to become hydrated salt .When this salt kept open in air looses water molecules in a process called efflorescence .When dissolved in water it forms a strong base and a weak acid Z.
Identify Z .

A

`CO_(2)`

B

`H_(2)CO_(3)`

C

`NaOH`

D

`H_(2)O`

Text Solution

Verified by Experts

The correct Answer is:
B
Z is carbonic acid , a weak acid formed when `Na_(2)CO_(3)` is dissolved in water .
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