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One metal gives gas vigorously with acid while another gives no gas. What is mainly compared by this observation?

Answer and explanation

Correct answer: Reactivity of metals

The ability of a metal to react with an acid and displace hydrogen depends mainly on its position in the reactivity series. A vigorous reaction indicates greater reactivity under the stated conditions, while no gas may indicate that the metal is below hydrogen or is insufficiently reactive. The observation does not measure colour, smell, or shape. Therefore option A, reactivity of metals, is correct.

Related tags

Metal ReactivityAcid ReactionHydrogenReactivity SeriesMetals And Non MetalsScienceClass 10 Mcq

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