Out of the following, which metal cannot displace hydrogen gas from dil $H C l$ or dil $H_{2} S O_{4}$ ?

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Solution

The correct option is B
Cu

Copper is less reactive than hydrogen. So, it can not displace hydrogen when it reacts with acid like $H C l$ and $H_{2} S O_{4}$ .

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H C l

H_{2} S O_{4}

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H C l

Which of the following cannot displace $H_{2}$ from dil. Acid?

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