Question

25. Which of the following involves the reduction of
copper?
(1) Cu(s)
+ 1/2O2 (g) → CuO(s)
(2) Cu2+(aq) + 2I-(aq)→ 2Cul(aq)
(3) CuCl (s) + 2F-(aq) → CuF2 + Cl2(g)
(4) CuO + H20 → Cu(OH)2​

Answer 1

Answer:

I think its 1 hoping it may be correct

thank you

Answer 2

Answer:

(2) oxidation state of cu reduces from +2 to +1

Explanation:

in (1) oxidation state of cu is changing from 0 to +2. thus it is getting oxidised

in (3) OS of Cu changes from +1 to +2. thus it is also getting oxidised.

in (4) there is no change in OS of Cu.