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Question
State two characteristics of the chemical reaction which takes place when dilute sulphuric acid is poured over zinc granules.
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Solution
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.
\[\ce{Zn_{(s)} + H2SO4_{(aq)} -> ZnSO4_{(aq)} + H2_{(g)} + Heat}\]
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