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Question is

Out of TiF62-, CoF63-, Cu2Cl2 and NiCl42- (Z of Ti = 22, Co= 27, Cu = 29, Ni =28) the colourless species are

  • TiF62- and CoF63-

  • Cu2Cl2 and NiCl42-

  • TiF62- and Cu2Cl2

  • CoF63- and NiCl42-

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