Assertion :In tetrahedral complexes low spin configurations are rarely observed. Reason: $Δ_{t} = (\frac{4}{9}) Δ_{0}$

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
$Δ_{t}$ is smaller as compared $Δ_{o}$ . Consequently, the orbital splitting energies are not sufficiently large enough to force spin pairing. This is because pairing energy is more than orbital splitting energy. Therefore, low spin configurations are rarely observed.

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Assertion :In tetrahedral complexes low spin configurations are rarely observed. Reason: Δt=(49)Δ0

Assertion :In tetrahedral complexes low spin configurations are rarely observed. Reason: $Δ_{t} = (\frac{4}{9}) Δ_{0}$