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Two metals A and B have reduction potent...

Two metals A and B have reduction potential values `-0.76 V and + 0.34 V` respectively. Which of these will liberate `H_(2)` from dil.`H_(2)SO_(4)` ?

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Metal having higher oxidation potential (or lower reduction potential) will liberate `H_2` from `H_2SO_4` . Thus A will liberate `H_2` from `H_2 SO_4`
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