Question

out of CO2+ and Zn2+ salt , which one is colourless and why​

Answer 1

Answer:

Configuration of Cu - [Ar]4s1 3d10

Configuration of Cu2+ - [Ar]3d9

As it is having unpaired electron which act as a F center imparts colour to It.

Whereas Configuration of Zn -[Ar]4s2 3d10

Configuration of Zn2+ - [Ar]3d10

As it is not having any unpaired electron that's why it is colourless and Diamagnetic

Explanation:

hope this helps please mark me as brainest