AIIMS 2017 Chemistry Isomerism in Coordination Compounds Assertion Reason Question

Option C is correct because the assertion that complexes of MX₆ and MX₃L do not show geometrical isomerism is true; these complexes typically adopt octahedral or trigonal planar geometries, which do not allow for isomerism due to their symmetrical arrangements. However, the reason provided is false because geometrical isomerism can occur in coordination complexes with coordination numbers of 4 and 6, but it specifically requires certain ligand arrangements, such as in square planar (for coordination number 4) or octahedral (for coordination number 6) geometries.

Option A is incorrect because, while the assertion is true, the reason is not a correct explanation. Option B is incorrect for the same reason; both statements cannot be true if the reason does not explain the assertion. Option D is incorrect as the assertion is indeed true.