When lead and zinc are dissolved in dilute hydrochloric acid, hydrogen gas do not released due to
(Given: Eo of lead = - 0.13 V, Eo of zinc = - 0.76 V)
Bubble overvoltage of hydrogen over lead and zinc are 0.64 V and 0.70 V respectively
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The surface of metallic lead is protected by a thin layer of lead oxide This renders the lead essentially insoluble in sulfuric acid. Lead reacts slowly with hydrochloric acid and nitric acid.
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