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Which of the following salts contain wat...

Which of the following salts contain water of crystallization?
(I) Gypsum
(II) Baking soda
(III) Copper sulphate
(IV)Washing soda

A

Both (I) and (II)

B

Both (II) and (IV)

C

(I), (II) and (III)

D

(I), (III) and (IV)

Text Solution

Verified by Experts

The correct Answer is:
D
Gypsum, copper sulphate and washing soda are salts having molecules of water attached to them.
Their formula is given below:
Gypsum: `CaSO_4. 2H_2O`
Copper sulphate: `CuSO_4. 5H_2O`
Washing soda: `Na_2CO_3. 10H_2O`
However, baking soda `(NaHCO_3)` does not contain any molecules of water of crystallization.
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