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Uses of Salts

Solubility cu...

Question

Solubility curves of four ionic salts $X, Y, Z$ and $W$ are shown. In which case the value of $Δ H_{s o l}$ is less than zero?

A

X

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B

Y

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C

Z

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D

W

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Solution

The correct option is A $X$
As the solubility decreases, the enthalpy of solvation also decreases, so in case of $X$ salt the $Δ H_{s o l} < 0$ .

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