Ncert Exercises & Solutions

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

1.	Both (A) and (R) are true and (R) is the correct explanation of (A).
2.	Both (A) and (R) are true but (R) is not the correct explanation of (A).
3.	(A) is true but (R) is false.
4.	(A) is false but (R) is true.

Hint: Metal poisoning is treated using chelation therapy

Toxic metal ions are removed by chelating ligands. When a solution of the chelating ligand is added to a solution containing

toxic metals ligands chelate the metal ions by the formation of a stable complex.

Hence, both assertion and reason are true and the reason is the correct explanation of assertion.