Question

$Cu+{XHNO}_3\to {Cu(NO}_3{)}_2+{YNO}_2+{2H}_{2}O$

The values of X and Y are:

• A. 3 and 1
• B. 8 and 6
• C. 4 and 2
• D. 7 and 1

Answer 1

Answer: (C)

4 and 2

Metallic copper reacts with 4 molecules of nitric acid to form copper nitrate 2 molecules of nitrogen dioxide gas and water vapour. The balanced chemical equation is $Cu+4HN{O}_3\to Cu(N{O}_3{)}_2+2N{O}_2+2H_{2}O$. So the values of X and Y are 4 and 2 respectively. So the correct option is C