Question

______ does not give hydrogen gas when it reacts with cold and very dilute nitric acid.

Options

• Cu

• Mn

Answer 1

Cu does not give hydrogen gas when it reacts with cold and very dilute nitric acid.

Explanation:

Copper does not react with very dilute nitric acid to produce hydrogen gas; it typically produces nitrogen oxides. On the other hand, Manganese (Mn) and Magnesium (Mg) are the only two metals that can react with very cold, very dilute nitric acid to evolve hydrogen gas.