Which gas is produced when dilute hydrochloric acid is added to a reactive metal? Write the chemical reaction when iron reacts with dilute sulphuric acid.

Question 4. Which gas is produced when dilute hydrochloric acid is added to a reactive metal? Write the chemical reaction when iron reacts with dilute sulphuric acid.
Answer: Hydrogen gas is evolved when hydrochloric acid is added to a reactive metal. The chemical reaction when iron reacts with dilute sulphuric acid is