Assertion : $F e C l_{3}$ can be reduced to $F e C l_{2}$ by $S n C l_{2}$ as well as by the addition of $S n$ into it. Reason: This reaction is possible since $S n^{4 +}$ is more stable than $S n^{2 +}$ (inert-pair effect)Also, $F e C l_{3}$ solution is acidic due to hydrolysis. $S n$ added reacts with $H C l$ forming nascent hydrogen that can reduce $F e C l_{3}$ to $F e C l_{2}$

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
$2 F e C l_{3} + S n C l_{2} \to S n C l_{4} + 2 F e C l_{2}$
This reaction is possible since $S n^{4 +}$ is more stable than $S n^{2 +}$ (inert-pair effect)

Also, $F e C l_{3}$ solution is acidic due to hydrolysis:

$F e C l_{3} + 3 H_{2} O ⇌ F e (O H)_{3} + 3 H C l$

$S n$ added reacts with $H C l$ forming nascent hydrogen that can reduce $F e C l_{3}$ to $F e C l_{2}$ :

$2 H C l + S n \to S n C l_{2} + 2 H (n a s c e n t)$

$F e C l_{3} + H \to F e C l_{2} + H C l$

So Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Hence option A is correct.

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