NEET2026ChemistryChapterActual
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R: Assertion A: The complex [Ti(H₂O)₆]³⁺ exhibits a violet colour in aqueous solution. Reason R: The colour of the complex is due to the excitation of an electron from the e_g level to the t_ 2g level. In the light of the above statements, choose the correct answer from the options given below:
Options
- ABoth Assertion A and Reason R are true and Reason R is the correct explanation of Assertion A.
- BBoth Assertion A and Reason R are true but Reason R is not the correct explanation of Assertion A.
- CAssertion A is true but Reason R is false.
- DAssertion A is false but Reason R is true.
Correct answer
C. Assertion A is true but Reason R is false.
Step-by-step solution
Assertion A is true because [Ti(H₂O)₆]³⁺ is an octahedral complex of Ti³⁺ which has a 3d^1 configuration. It absorbs yellow-green light and transmits violet light, making the solution appear violet. Reason R is false because in an octahedral complex, the d-orbitals split into a lower energy t_ 2g level and a higher energy e_g level. The single electron in Ti³⁺ is present in the t_ 2g level. The colour is due to the d-d transition of this electron from the lower energy t_ 2g level to the higher energy e_g level, not