`Ni` ಮತ್ತು `Cu` ನ ಪರಮಾಣು ಸಂಖ್ಯೆಗಳು ಕ್ರಮವಾಗಿ `28` ಮತ್ತು `29`. ಎಲೆಕ್ಟ್ರಾನಿಕ್

Amongst TiF_(6)^(2-),CoF_(6)^(3-),Cu_(2)Cl_(2) and NiCl_(4)^(2-) (Atomic number Ai = 22, Co = 27, Cu = 29, Ni = 28). The colourless species are

Giving reasons indicate which one of the following would be coloured ? Cu^+ , V^(2+), Sc^(3+), Ni^(2+) (At. no. of Cu = 29, V = 23, Sc = 21, Ni = 28)

In which of the following paris both the ions are coloured in aqueous solution? (Atomic number, Sc - 21, Ti = 22, Ni = 28, Cu = 29, Co = 27)

Among TiF_(6)^(2-), CoF_(6)^(3-), Cu_(2)Cl_(2) and NiCl_(4)^(2-) (At. No. Ti = 22, Co = 27, Cu = 29, Ni = 28) , the colourless species are -