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A metal gives a gas with acid and the gas gives a pop sound near a burning splint. Which conclusion about the metal is correct?

Answer and explanation

Correct answer: The metal is more reactive than hydrogen

A burning splint producing a characteristic pop confirms that the gas is hydrogen. In the usual reaction of a metal with a dilute acid, the metal displaces hydrogen: metal + acid → salt + H₂. Such displacement is possible when the metal is above hydrogen in the reactivity series. Therefore option A is correct; carbonate is a compound, not a metal, and the other statements conflict with the test.

Related tags

Reactivity SeriesHydrogenMetal-Acid ReactionMetals And Non MetalsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScienceClass 10 Mcq

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