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प्रश्न
Why are the following metal not used in the lab. preparation of hydrogen?
iron
उत्तर
Iron has to be heated, and hydrogen thus produced contains impurities such as hydrogen sulphide and sulphur dioxide.
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संबंधित प्रश्न
Fill in the blank
Hydrogen reacts with metal oxides to form ............and....................
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A metal which reacts with water to give a metallic hydroxide & liberate hydrogen.
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\[\ce{KAlO2<-KOH->K2ZnO2}\]
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