Question

Which of the following reactions is not correct with respect to products formed?

• A. \(3{Cu} + 8{HNO}_3 {(dilute)} \rightarrow 3{Cu(NO}_3)_2 + {N}_2{O} + 4{H}_2{O}\)
• B. \(4{Zn} + 10{HNO}_3 {(dilute)} \rightarrow 4{Zn(NO}_3)_2 + {N}_2{O} + 5{H}_2{O}\)
• C. \( {Cu} + 4{HNO}_3 {(conc)} \rightarrow {Cu(NO}_3)_2 + 2{NO}_2 + 2{H}_2{O}\)
• D. \( {Zn} + 4{HNO}_3 {(conc)} \rightarrow {Zn(NO}_3)_2 + 2{NO}_2 + 2{H}_2{O}\)

Hint:

It is essential to understand the typical products of reactions involving metals and nitric acid, as the concentration of the acid can significantly influence the nitrogen oxides formed.

Answer 1

The Correct Option is A

The reaction involving copper and dilute nitric acid typically produces copper(II) nitrate, nitrogen monoxide \( {NO} \), and water. The formation of nitrous oxide \( {N}_2{O} \) in this reaction is unusual and not typically observed under the conditions described. Normally, \( {NO} \) is the expected product, not \( {N}_2{O} \).