Question

The preparation of copper sulphate involves hot and concentrated acid solution because:

• A. it takes lesser time
• B. it produces good quality of copper sulphate
• C. copper is very weak reducing agent
• D. copper does not get oxidised easilly.

Answer 1

Answer: (C), (D)

The correct options are
C copper is very weak reducing agent
D copper does not get oxidised easilly.

Copper metal oxidation state increase from 0 to $+2$ but it is a very weak reducing agent.

[more easily oxidised $\to$ strong reducing agent]

So, concentrated $H_{2}S{O}_4$ is used, which is a strong oxidizing agent, it can oxidize copper.