Question: Which of the following statements about coordination compounds is incorrect? (2023)

Options:

1. They can exhibit geometric isomerism.
2. They can exhibit optical isomerism.
3. All coordination compounds are colored.
4. They can form complexes with transition metals.

Correct Answer: All coordination compounds are colored.

Exam Year: 2023

Solution:

Not all coordination compounds are colored; the color depends on the nature of the metal and the ligands involved. Some coordination compounds can be colorless.