1.

Solubility of the alkaline metal sulphates in water decreases in the sequence .

Answer»

`SR gt Ca gt Mg gt BA`
`Ba gt Mg gt Sr gt Ca`
`Mg gt Ca gt Sr gt Ba`
`Ca gt Sr gt Ba gt Mg`

SOLUTION :The solubility of alkaline earth metal sulphates decreases down the group due to a corresponding decrease in HYDRATION ENTHALPY .


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