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Given below are two statements : one is ...

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 polarising power than other alkali metal group members .
In the light of the above statements ,choose the most appropriate answer from the options given below :

A

If both assertion and reason are true and the reason is the correct explanation of the assertion

B

If both assertion and reason are true but reason is not the correct explanation of the assertion

C

If assertion is true but reason is false

D

If the assertion and reason both are false

Text Solution

Verified by Experts

The correct Answer is:
B
Lithium has smallest size among the alkali metal. So charge to size ratio of lithium is very high. Due to this lithium salts are hydrated in nature. LiCl is deliquescent and crystallises as a hydrate, `LiCl. 2H_2 O` whereas other alkali metal chlorides do not form hydrates. Polarising power is related to covalent character.
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