A metal comples having composition Cr(NH_(3))_(4)CI_(2)Br has been isolated in two forms A and B. The form A reacts with AgNO_(3) to give a white precipitate readily soluble in dilute aqueous ammonia, where as B gives a plae yellow precipitate soluble in concentrated ammonia. The hybridisation of Cr in A and magnetic momentum in B are respectively

A metal comples having composition Cr(NH_(3))_(4)CI_(2)Br has been iso

1.	A metal comples having composition Cr(NH_(3))_(4)CI_(2)Br has been isolated in two forms A and B. The form A reacts with AgNO_(3) to give a white precipitate readily soluble in dilute aqueous ammonia, where as B gives a plae yellow precipitate soluble in concentrated ammonia. The hybridisation of Cr in A and magnetic momentum in B are respectively
Answer» `d^(2)sp^(3),2.8BM` `sp^(3)d^(2),3.8MB` `d^(2)s^(3),3.8BM` `sp^(3)d^(2),2.8BM` Solution :(A) : `CL^(-1)` ION must be out of co-ordination sphere to react with `AgNO_(3)`. `[Crunderset((A))((NH_(3))_(4)BRCL](sp^(3)d^(2)),[Crunderset((B))((NH_(3))_(4)Cl_(2))]Br(3.8Bm)`