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Metal A displaces metal B and metal B displaces metal C from their salt solutions. Which is least reactive?

Answer and explanation

Correct answer: Metal C

A displacement reaction follows the reactivity series: a more reactive metal can remove a less reactive metal from its salt solution. Since A displaces B, A is more reactive than B. Since B displaces C, B is more reactive than C. The order is therefore A > B > C, making C the least reactive metal. Hence option C is correct; option D ignores the evidence from both displacement reactions.

Related tags

Reactivity SeriesDisplacement ReactionMetalsSalt SolutionsChemical ReactionsMetals And Non MetalsScienceClass 10 Mcq

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