Answer :

a) Experiment-1- When Mg react with dilute HCl in test tube then hydrogen gas will evolve.

Experiment-2- When Zn react with dilute HCl in a test tube then hydrogen gas will evolve.


The reaction of Mg with dilute HCl will occur faster than the reaction of Zn with dilute HCl. The Mg is more reactive than Zn because Mg is above to Zn in reactivity series. So, the nature of reactants can influence the rate of reaction.


b) Mg + 2HCl MgCl2 + H2


Zn + 2HCl ZnCl2 + H2


c) Rate of reaction = Amount of reactants used


Time is taken for consumption of the reactant


Rate of reaction = ______Amount of product formed_______


Time is taken for the formation of the product


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