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NEET UG CHEMISTRY MCQ: S-BLOCK ELEMENTS
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Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) Barium carbonate is insoluble in water and is highly stable.
Reason (R) The thermal stability of the carbonates increases with increasing cationic size.
Assertion (A) Barium carbonate is insoluble in water and is highly stable.
Reason (R) The thermal stability of the carbonates increases with increasing cationic size.
View answer and explanation
Correct option: A
Both (A) and (R) are true and (R) is the correct explanation of (A).
Option A is correct because the thermal stability of carbonates increases with increasing cationic size, and barium has a larger cationic size compared to other alkaline earth metals, making barium carbonate more stable and less soluble.
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