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Hydrogen may be prepared in the laborato...

Hydrogen may be prepared in the laboratory by the action of a metal with an acid.
Which of the metals copper, zinc, magnesium or sodium would be the most suitable ?

Text Solution

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Zinc is the most suitable metal which can be used in the lab, as the reaction is vigorous but not violent. Zinc is placed above hydrogen in the activity series and hence, can displaçe Hydrogen from dilute acids like HCl.
Copper is placed below Hydrogen and hence, cannot displace Hydrogen from HCl. Magnesium is highly expensive and hence is not a preferred option, Sodium reacts violently with acids and is very dangerous.
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