A metal complex having composition has been isolated in two forms (X) and (Y). The form (X) reacts with to give a white precipitate readily soluble in aqueous ammonia, whereas (Y) gives a pale-yellow precipitate soluble in concentrated ammonia.
Choose the correct statement regarding the complex X and Y.
(i) Both complexes have same Van’t Hoff factor for same extent of dissociation
(ii) Both complexes have exactly same conductivity in `H_(2)O`
(iii) In both the complexes is involved only to secondary valency
(iv) In both the complexes electronic configuration of `t_(2_(g))` subshell is same.
The correct choice is :

Options

A. I,ii and iii
B. I,ii,iii and iv
C. ii,iii and iv
D. I, iii and iv

Answer

D

Explanation

`X: [Cr(NH_(3))_(4) ClBr] Cl, Y: [Cr(NH_(3))_(4) Cl_(2)]Br`
Both complexes have same van’t Hoff factor.
Both complex form different ions in water hence conductivity is not exactly same
In both complexes `NH_3` is involved in secondary valency
In both complexes’ electronic configuration of is same
Hence A, C, D are correct statements.