Assertion : $F e C l_{3}$ and $F e C l_{2}$ exist in dimer form in vapor phase. Reason: In dimer form, they have $(3 C - 4 e^{-})$ bond.

Assertion is true, Reason is true and Reason is correct explanation for Assertion.

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Assertion is true, Reason is true and Reason is not the correct explanation for Assertion.

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Assertion is true, Reason is false.

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Assertion is false, Reason is true.

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Solution

The correct option is B Assertion is true, Reason is true and Reason is not the correct explanation for Assertion.
$F e C l_{3}$ and $F e C l_{2}$ exist in dimer form in vapor phase.
In dimer form, they have $(3 C - 4 e^{-})$ bond. They contain chlorine bridges.

Assertion is true, Reason is true and Reason is not the correct explanation for Assertion.

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Assertion :FeCl3 and FeCl2 exist in dimer form in vapor phase. Reason: In dimer form, they have (3C−4e−) bond.

Assertion : $F e C l_{3}$ and $F e C l_{2}$ exist in dimer form in vapor phase. Reason: In dimer form, they have $(3 C - 4 e^{-})$ bond.