1.

Assertion : BaCO_(3) is more soluble in HNO_(3) than in plain water. Reason : Carbonate is a weak base and reacts with the H^(+) from the strong acid, causing the barium salt to dissociate.

Answer»

If both ASSERTION and reason are true and reason is the correct EXPLANATION of the assertion
If both assertion and reason aretrue but reason is not the correct explanation is true but reason is false.
If the assertion and reason both are false.
If the assertion and reason both are false.

Solution :BARIUM carbonate is more soluble in `HNO_(3)` than in water because carbonate is a weak base and REACTS with the `H^(+)` ion of `HNO_(3)` causing the barium salt to dissociate.
`BaCO_(3) + HNO_(3) RARR Ba(NO_(3))_(2) + CO_(2) + H_(2)O`


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