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A metal does not give hydrogen gas with an acid, but zinc gives gas in the same acid. Which conclusion is correct?

Answer and explanation

Correct answer: The first metal may be less reactive than zinc

A metal above hydrogen in the reactivity series can generally displace hydrogen from a dilute non-oxidising acid. Since zinc reacts with the same acid and releases hydrogen, while the unnamed metal does not under the stated conditions, the first metal may be below zinc in reactivity. It cannot be identified as sodium, and the acid must contain replaceable hydrogen. Hence A is the valid conclusion.

Related tags

Reactivity SeriesZincHydrogen GasAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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