Which metal fails to evolve hydrogen gas with dil. HCL ?Correct answer is 'Copper'. Can you explain this answer?

Question

Answer

Copper fails because copper is less reactive than Hydrogen.So it cannot displace hydrogen

Answer

Copper cannot  evolve hydrogen gas with dilute hydrochloric acid, because copper is not able to displace hydrogen from hydrochloric acid as it is less reactive than hydrogen

Answer

Explanation:

When a metal reacts with an acid, it displaces hydrogen from the acid and forms a salt with the anion of the acid. This reaction is known as a single displacement reaction. During this reaction, the metal reacts with the acid to form a salt and hydrogen gas is evolved.

However, copper is an exception to this reaction. Copper does not react with dilute hydrochloric acid and does not displace hydrogen gas. The reason for this is that copper is a less reactive metal compared to hydrogen. It is placed below hydrogen in the reactivity series of metals. Therefore, it cannot displace hydrogen from hydrochloric acid.

Reactivity series of metals:

The reactivity series of metals is a list of metals arranged in the order of their decreasing reactivity. This series is based on the ability of a metal to displace hydrogen from an acid. The reactivity series of metals is as follows:

- Potassium
- Sodium
- Calcium
- Magnesium
- Aluminium
- Zinc
- Iron
- Lead
- Hydrogen
- Copper
- Silver
- Gold

Why copper does not react with hydrochloric acid?

Copper is placed below hydrogen in the reactivity series of metals. Therefore, it cannot displace hydrogen from hydrochloric acid. The reactivity series of metals tells us that a metal can only displace another metal from its salt solution if the metal is placed above the other metal in the reactivity series. Since copper is less reactive than hydrogen, it cannot displace hydrogen from hydrochloric acid.

Conclusion:

In conclusion, copper does not evolve hydrogen gas with dilute hydrochloric acid because it is a less reactive metal compared to hydrogen.

Answer

Because copper is placed below hydrogen in the reactivity series. The metal which placed above the hydrogen in the reactivity series will evolve hydrogen gas.

Answer

Copper is placed below hydrogen in the reactivity series. The metal which placed above the hydrogen in the reactivity series will evolve hydrogen gas.

Answer

Ya copper is the rgt ans bcz it is below the hydrogen in reactivity series so that it cannot replace hydrogen from HCl so there is no means of reaction.

Answer

Yes copper fails to evolve hydrogen gas when during the reaction between copper and dil.Hcl  because copper is less reactive than hydrogen and can't displace hydrogen from Hcl .

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