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Q.

Is it true that copper can be used to prepare hydrogen by the action of an acid?


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a

True

b

False 

answer is B.

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Detailed Solution

The above statement is false.
A less reactive metal is copper. In the reactive series, copper is below hydrogen and won't displace it from acid or water. Because of this, copper cannot produce hydrogen through a reaction with weak acids. Some metals, like potassium, sodium, and magnesium, react with weak hydrogen chloride to form hydrogen, whereas other metals, including aluminium, copper, and mercury, do not react with hydrogen chloride to make hydrogen.
The correct statement would be, “Copper can not be used to prepare hydrogen by the action of an acid”.
 
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