Question 1 of 3

Out of TiF62-,CoF63-,Cu2Cl2and NiCl42-(At. no. Z of Ti=22, Co=27, Cu=29, Ni=28), the colourless species are

(a) TiF62- and CoF63-

(b) Cu2Cl2 and NiCl42-

(c) TiF62- and Cu2Cl2 

(d) CoF63- and NiCl42-