Question

State two characteristics of the chemical reaction which takes place when dilute sulphuric acid is poured over zinc granules.

Answer 1

When dilute sulphuric acid is poured over zinc granules, hydrogen gas is evolved, and the mixture becomes hot. Hence, the evolution of a gas and a change in temperature are two characteristics of this chemical reaction.

\[\ce{Zn_{(s)} + H2SO4_{(aq)} -> ZnSO4_{(aq)} + H2_{(g)} + Heat}\]