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प्रश्न
Why are the following metals not used in the lab. preparation of hydrogen?
aluminium
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उत्तर
Aluminium forms a protective coating of Al2O3 due to its great affinity for oxygen. So, it does not give hydrogen with acid after the reaction has occurred for some time.
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संबंधित प्रश्न
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from acid?
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A metal which reacts with water to give a metallic hydroxide & liberate hydrogen.
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\[\ce{MgO + H2}\]
