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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): Lithium salts are hydrated. Reason (R): Lithium has higher polarizing power than other alkali metal group members. In the light of the above statements, choose the most appropriate answer from the options given below: (1) Both (A) and (R) are correct but (R) is NOT the correct explanation of (A). (2) (A) is correct but (R) is not correct. (3) (A) is not correct but (R) is correct. (4) Both (A) and (R) are correct and (R) is the correct explanation of (A).

1. Both (A) and (R) are correct but (R) is NOT the correct explanation of (A).
2. (A) is correct but (R) is not correct.
3. (A) is not correct but (R) is correct.
4. Both (A) and (R) are correct and (R) is the correct explanation of (A).

Correct answer: Both (A) and (R) are correct and (R) is the correct explanation of (A).

Solution

Lithium ion is very small with high charge density, giving it the highest polarizing power among alkali metals, so its salts (e.g. LiCl*H2O) are commonly hydrated. Both (A) and (R) are correct and (R) is the correct explanation of (A).

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