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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, "evolution of a gas" and "change in temperature" are two characteristics of this chemical reaction.
Zn (s) + H2SO4 (aq) → ZnSO4 (aq) + H2 (g) + HEAT
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