1.

Solubility curve of a hydrated salt in water with temperature is given. The curve indicates that the solution process is

Answer»

exothermic temperature
exotehrmic till `60^(@)C` and ENDOTHERMIC after `60^(@)C`
endothermic till `60^(@)C` and exothermic there-after
endothermic

Solution :Since solubility increases with INCREASE in temperature upto `60^(@)C`, the process is endothermic upto `60^(@)C`. After `60^(@)C` solubility DECREASES with increase in temperature, THUS after `60^(@)C`, the process is exothermic.


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