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Central Atom and Ligands

Assertion :Hy...

Question

Assertion :Hydrazine is a neutral ligand. Reason: It has two N as donor atoms and behaves as a chelating ligand.

A

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

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B

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

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C

Assertion is correct but Reason is incorrect

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D

Assertion is incorrect but Reason is correct

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Solution

The correct option is C Assertion is correct but Reason is incorrect
Hydrazine $(N H_{2} - N H_{2})$ is a neutral ligand. It does not carry positive or negative charge.
Thus the assertion is correct.
It has two donor nitrogen atoms but it cannot form a chelate with metal as the chelate formed will contain 3 member ring and will be highly stained.
Hence, it is not a chelating ligand.
Thus the reason is incorrect.

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