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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 H2SO4.

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Solution

Hydrogen gas is evolved when dilute hydrochloric acid is added to a reactive metal.

When iron reacts with dilute H2SO4, iron (II) sulphate is formed along with the evolution of hydrogen gas. The reaction involved is:

Fe (s)+H2SO4(aq)FeSO4(aq)+H2(g)

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