Why nitric acid is not used to prepare hydrogen gas
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Explanation:
Nitric Acid is a very strong oxidizing agent. It oxidizes the Dihydrogen Gas produced during the reaction with metals to Water. That is why Nitric Acid cannot be used for the preparation of hydrogen gas.
However, metals like Magnesium and Manganese still produce Hydrogen Gas but with very dilute nitric acid. Only 1% dilute and cold nitric acid reacts with magnesium and manganese to liberate Hydrogen gas.
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