Question

Which gas is formed when an amphoteric metal reacts with a strong base?

• A. $H_2{O}_{\left(g\right)}$
• B. $H_{2\left(g\right)}$
• C. $C{O}_{\left(g\right)}$
• D. $O_{2\left(g\right)}$

Answer 1

The correct option is B

$H_{2\left(g\right)}$

Amphoteric metal like Zinc and Aluminium on reacting with a strong base like Sodium Hydroxide produces the respective salt with liberation of hydrogen gas.