Question

What is the colour of:
1. Cu+
2. Cu2+
3. Cu3+?

Answer 1

Copper(I) is diamagnetic; therefore, the ion is expected to be colorless unless due to other factors than unpaired electrons(e.g. to the anion). Copper(II) compounds are blue to green, to turquoise. Binary compounds of copper(III) are not common.

Answer 2

What is a daniel cell?

Answer 3

Daniel cell is a primary cell which cannot supply steady current for a long time. Daniel cell produces an emf of 1.08 volt.