Question

34. Assertion In the reaction,
2Cu,C(s) + Cu,S(s) → Cu(s) + SO2(g)
copper acts as a oxidant and sulphur acts as an reductant
Reason:The given reaction is not a redox reaction

​

Answer 1

Explanation:

The oxidation states are as :

2

Cu

+1

2

O

−2

(

s)+

Cu

+1

2

S

−2

(

s) → 6

Cu

0

(

s)+

S

+4

O

−2

2(g)

Copper is reduced from +1 state to zero . Sulphur is oxidised from -2 state to -4 . Cu

2

O helps sulphur in Cu

2

S to increase its oxidation number , hence Cu(I) is an oxidant and sulphur of Cu

2

S helps copper both in Cu

2

S and Cu

2

O to decrease its oxidation number, hence S of Cu

2

S is a reductant . And the reaction is redox reaction

Answer 2

Answer:

2cuc+cus >2cus+so2

cu2+ S4+ S4+ O 2-