JEE Main 2019 Chemistry question

Chemistry Coordination Compounds JEE Main 2019

Two complexes [Cr(HO)]Cl (A) and [Cr(NH)]Cl (B) are violet and yellow coloured, respectively. The incorrect statement regarding them is:

(A)Δ value for (A) is less than that of (B).
(B)both absorb energies corresponding to their complementary colors.
(C)Δ values of (A) and (B) are calculated from the energies of violet and yellow light, respectively.Correct
(D)both are paramagnetic with three unpaired electrons.

Answer: (C)

Solution

Δ corresponds to the absorbed (complementary) colour, not the observed colour.

Question ID VK-010069