Question

Zn displaces H2 gas from acids but cu cannot give reason​

Answer 1

Answer:

Zinc liberates hydrogen gas when reacted with dilute hydrochloric acid, whereas copper does not.

Zinc is above hydrogen in reactivity series. Any element that is above hydrogen in reactivity series can displace hydrogen from dilute hydrochloric acid solution.

Zn+2HCl(dil)→ZnCl

2

+H

2

Copper is below hydrogen in reactivity series. Any element that is below hydrogen in reactivity series can not displace hydrogen from dilute hydrochloric acid solution.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

Answer 2

Answer:

because Zn is more reactive than hydrogen, so it displaces it from acids.

But, cu is less reactive than hydrogen.

a more reactive element displaces a less reactive element from its compound, is called displacement reaction.