Question

Among the following, the set that has all the coloured ions is

(At. no. of Sc=21, Fe = 26 ,Co = 27, Ni = 28, Cu = 29)
A-cu+, Cu2+, Ni2+
B-cu2+,co2+,Sc3+
C-Cu2+,Fe2+,co2+
D-Cu+,Co2+,Ni2+​

Answer 1

Answer:

cu+,cu2+,Ni2+ has coloured ions