Question

Which of the following metal evolves hydrogen on reacting with cold dilute $HN{O}_3$ ?

• A. Mg
• B. Al
• C. Fe
• D. Cu

Answer 1

Answer: (A)

Magnesium and manganese are the metals that produce hydrogen with dilute nitric acid $Mg+2HN{O}_3\to Mg(N{O}_3{)}_2+H_2$