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What is the correct identification of the gas formed when zinc reacts with dilute hydrochloric acid?

Answer and explanation

Correct answer: Hydrogen gas

The governing reaction is metal–acid displacement. Zinc, being above hydrogen in the reactivity series, displaces hydrogen from hydrochloric acid: Zn + 2HCl → ZnCl₂ + H₂. The gas released is hydrogen, and a sample gives a characteristic ‘pop’ when tested with a burning splint. Thus option A is correct. Oxygen is not released, chlorine is not produced, and carbon dioxide requires a carbonate or hydrogen carbonate reactant.

Related tags

ScienceClass10Metal-Acid-ReactionHydrogenAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And Behaviour

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