Assertion :Melting point of $M n$ is more than that of $F e$ . Reason: $M n$ has higher number of unpaired $e^{-}$ than $F e$ in atomic state.

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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Assertion is incorrect but Reason is correct

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Solution

The correct option is D Assertion is incorrect but Reason is correct
Mn has a higher number of unpaired electrons (5) than Fe(4) in atomic state.
Greater is the number of unpaired greater is the melting point.
Hence, the melting point of Mn should be higher than that of Fe.
But, the melting point of Mn is less than that of Fe. This is probably due to the complicated lattice structure of manganese.
Thus, Assertion is incorrect but Reason is correct.

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Assertion :Melting point of Mn is more than that of Fe. Reason: Mn has higher number of unpaired e− than Fe in atomic state.

Assertion :Melting point of $M n$ is more than that of $F e$ . Reason: $M n$ has higher number of unpaired $e^{-}$ than $F e$ in atomic state.