Given below are two statements, one is labelled as assertion A and the other is labelled as Reason R.
Assertion A: [CoCl(NH$$_3$$)$$_5$$]$$^{2+}$$ absorbs at lower wavelength of light with respect to [Co(NH$$_3$$)$$_5$$(H$$_2$$O)]$$^{3+}$$
Reason R: It is because the wavelength of light absorbed depends on the oxidation state of the metal ion.

Assertion A: [CoCl(NH₃)₅]²⁺ absorbs at lower wavelength than [Co(NH₃)₅(H₂O)]³⁺.

Both have Co³⁺ (d⁶). Cl⁻ is a weaker field ligand than H₂O. Weaker field → smaller Δ → longer wavelength absorbed. So [CoCl(NH₃)₅]²⁺ absorbs at LONGER wavelength. A is False.

Reason R: Wavelength of light depends on oxidation state. This is True — higher oxidation state generally means larger crystal field splitting.

A is false but R is true.