1.

Solubility curve of Na_(2)SO_(4).10H_(2)O in water with temperature is given as

Answer»

`DeltaH` is -ve after `34^(@)C`
solution process is EXOTHERMIC till `34^(@)C` and ENDOTHERMIC after `34^(@)C`
solution process is endothermic till `34^(@)C` and exothermic THEREAFTER
`DeltaH` is -ve after `34^(@)C`

ANSWER :A::C::D


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