Question

3. In the following reaction: Cu(s) + 4 HNO3 (aq)  Cu(NO3)2 (aq) + 2NO2(g) + 2H2O(l) which of the following statements about copper is true? A. Copper undergoes reduction and its oxidation number decreases. B. Copper undergoes oxidation and its oxidation number decreases. C. Copper undergoes reduction and its oxidation number increases. D. Copper undergoes oxidation and its oxidation number increases.

Answer 1

Answer:

d. is Right One.

Explanation:

copper's oxidation number increase from zero to 2.