In the following questions a statement of assertion (A) followed by a statement of reason (R) is given. Choose the correct answer out of the following choices.
(a) Assertion and reason both are true, reason is correct explanation of assertion.
(b) Assertion and reason both are true but reason is not the correct explanation of assertion.
(c) Assertion is true, reason is false.
(d) Assertion is false, reason is true.

Assertion (A) Toxic metal ions are removed by the chelating ligands.
Reason (R) Chelate complexes tend to be more stable.

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Solution

Answer: (a)
Assertion and reason both are correct and the reason is the correct explanation of assertion.
Toxic metal ions are removed by chelating ligands. When a solution of chelating ligand is added to a solution containing toxic metals ligands chelates the metal ions by the formation of the stable complex.

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