Mixture X of 0.02 mole of [Co(NH3)5SO4]Br and 0.02 mole of [Co(NH3)5Br]SO4 was prepared in 2 litre of solution: 1 litre of mixture X + excess of AgNO3→Y; 1 litre of mixture X + excess of BaCl2→Z. Number of moles of Y and Z respectively are:
(1) 0.01, 0.02
(2) 0.02, 0.01
(3) 0.01, 0.01
(4) 0.02, 0.02