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Reactivity with Halogens and Hydrogen (Group 2)

Assertion : T...

Question

Assertion : The reaction $L i I + K F \to L i F + K I$ proceed in the forward direction.
Reason : Fluorine, being more reactive can easily replace iodine.

A

Both Assertion and Reason are true and Reason is the correct explanation of Assertion.

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B

Both Assertion and Reason are true but Reason is not a correct explanation of Assertion.

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C

Assertion is true but Reason is false.

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D

Both Assertion and Reason are false.

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Solution

The correct option is B Both Assertion and Reason are true but Reason is not a correct explanation of Assertion.
The reaction proceeds in forward reaction because LiF is more stable than LiI as it has higher bond disassociation energy because of small radius of both cation (Li) and anion (F).

Larger cation is stabilized by larger anion (as in this case K is stabilized by I ).

Hence,option B is correct.

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