One molal solution of a complex of cobalt chloride with NH3 in water showed an elevation in boiling point equal to 2.080. Assuming that the complex is completely ionised in the solution, the complex is (kb of water = 0.52 kg Kmol–1).

molality of cobalt complex solution = 1m of the sol. =2.080cKb = 0.52 KKgmole-12.08 = i(0.52)(1)i = 4No.of  moles of ions produced by one mole of complex = 4From options,                                      4 ions(i=4)option(1) is correct