Which of the following metals does not liberate hydrogen from acids?

F e

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C u

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M g

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Z n

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Solution

The correct option is A $C u$
Copper, silver, gold and platinum being less reactive than hydrogen cannot displace hydrogen from acids.
Metals that are more reactive than hydrogen can displace hydrogen from acids. These metals include sodium, potassium, lead and zinc.

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Among Mg, Cu, Fe, Zn, the metal that does not produce hydrogen gas in reaction with hydrochloric acid is.

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Arrange the following metals in the order in which they displace each other from the solution of their salts.

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