Which of the following statements is/are true?

Options

A. In metal carbonyl complexes d increases compared to that in CO molecule
B. The pair of compounds `[Cr(H_(2)O)_(6)]Cl_(3)" and "[CrCl_(3)(H_(2)O)_(3)].3H_(2)O` shows hydration isomerism
C. `d_(z^(2))` orbital of central metal atom/ion is used in `dsp^(2)` hybridisation
D. Facial and meridional isomers associated with `[Ma_(3)b_(3)]^(npm)` type complex compound, both are optically inactive

Answer

a,d

Explanation

Water of hydration exists in ionic compounds. `.^(d)x^(2)-y^(2)` orbitals is used in `dsp^(2)` hybridization.