Assertion :Statement − 1 : NH2−NH2 is not a chelating ligand. Reason: Statement − 2 : A chelating ligand must posses two or more lone pair at such a distance that it may form suitable strain free ring at the metal ion.
A
Statement − 1 is true, Statement − 2 is true and Statement − 2 is correct explanation for Statement − 1.
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B
Statement − 1 is true, Statement − 2 is true and Statement − 2 is NOT the correct explanation for Statement − 1.
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C
Statement − 1 is true, Statement − 2 is false.
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D
Statement − 1 is false, Statement − 2 is true.
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Solution
The correct option is A Statement − 1 is true, Statement − 2 is true and Statement − 2 is correct explanation for Statement − 1. Chelating ligand: a ligand that is attached to a central metal ion by bonds from two or more donor atoms. And chelating ligand must posses two or more lone pair at such a distance that it may form suitable strain free ring at the metal ion. NH2−NH2 is not a chelating ligand as it forms three member ring which will not be stable due to strain and charge repulsion.