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Which gas is generally produced when dilute acids react with active metals?

Answer and explanation

Correct answer: Hydrogen

Dilute acids react with active metals such as zinc or magnesium to form a salt and hydrogen gas. For example, \(\mathrm{Zn + 2HCl \rightarrow ZnCl_2 + H_2}\). Therefore, hydrogen is the correct answer. Carbon dioxide is produced when an acid reacts with a carbonate or hydrogen carbonate, not in the usual acid–metal reaction.

Related tags

Class 10 ScienceAcids Bases SaltsAcid Metal ReactionHydrogen GasChemical Reactions

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