`Cr(NH_3)_4Cl_2Br` has been isolated in two forms A and B. the form Areacts with `AgNO_3` to give a white precipitate readily soluble in dilute aqueous ammonia whereas B gives a pale yellow precipitate soluble in concentrated ammonia.
Write the formulae of isomers A and B.

A metal complex 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 whereas B gives a pale yellow precipitate soluble in concentrated ammonia. (i) Write the formulae of isomers A and B. (ii) State the hybridisation of chromium in each of them. (iii) Calculate the magnetic moment (spin only) of the isomer A.

A metal complex having composition Cr(NH_(3))_(4)CI_(2) Br has been isolated in two forms A and B The A reacts with AgNO_(3) to give a white precipitate readily soluble in dilute queous ammonia, whereas B gives a pale-yellow precipitate soluble in concentrated ammonia Write the formula of A and B and state the hybridisation of chromium in each. Calculate their magnetic moment (spin only value) .