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If Na^+ ion is larger than Mg^(2+) and ...

If `Na^+` ion is larger than `Mg^(2+)` and `S^(2-)` ion is least soluble in water

A

Sodium chloride

B

sodium sulphide

C

Magnesium chloride

D

Magnesium sulphide

Text Solution

Verified by Experts

The correct Answer is:
D
According to Fajan's rule if we have small cation, large anion and high charge on the ions, the compounds is covalent and will be less soluble in water. Since `Mg^(+2)` is small and `S^(-2)` ion is large, MgS will be most covalent and hence least soluble.
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