Question

a substance that does not contain water of crystallization

A - Common salt
B - Washing soda crystal ​

Answer 1

Answer:

common salt It is right answer

Explanation:

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Answer 2

Answer:

Baking soda does not contain water of crystallization. The chemical formula of baking soda is NaHCO3. Its formula does not show any association with water molecules.

Other three contain water of crystallization blue vitriol (CuSO4 .5H2O), washing soda (Na2CO3 .10H2O) and gypsum (CaSO4 .2H2O).