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JEE Main Chemistry question

ChemistryElectrochemistryJEE Main

values of some metals are Be : Mg : Ca : Sr : Cu : Hg : Number of metals which can displace gas from acid is

Answer: 4

Solution

A metal can displace from acid only if its standard reduction potential is more negative than that of hydrogen, — such a metal is more easily oxidised than hydrogen and therefore reduces to . Be

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Question ID VK-137731