Question

For the disproportionation of copper 2Cu+ → Cu²⁺ + Cu, E° is (Given : E° for Cu²⁺/Cu is 0.34 V and E° for Cu²⁺/Cu⁺ is 0.15 V.)

(a) 0.49 V 

(b) -0.19 V

(c) 0.38 V

(d) -0.38 V

Answer 1

Correct option (c) 0.38 V

Explanation :

For the reaction 2Cu⁺ → Cu²⁺ + Cu the cathode is Cu⁺/Cu and anode is Cu⁺/Cu²⁺.