An ionic compound that attracts atmospheric water so strongly that a hydrate is formed is said to be:

Dilute

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Hygroscopic

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Immiscible

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Miscible

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Solution

The correct option is B
Hygroscopic

Some substances tend to absorb moisture molecules from their surroundings to form hydrates. This property is called hygroscopy. Extreme hygroscopy - where moisture absorbed is so high that the substance itself dissolves in the water absorbed - is called deliquescence. Ex: $Z n C l_{2}$ and $C a C l_{2}$

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