Question

zinc liberates Hydrogen gas when reacts with dilute Hydrochloric acid whereas copper doesn't . Explain...
why....?????​

Answer 1

Zinc liberates hydrogen gas when reacted with dilute hydrochloric acid, whereas copper does not. ... It means that zinc oxidises (loses electrons) more easily than hydrogen whereas copper does not do so. So, copper does not displace hydrogen from dilute acids.

Answer 2

Zinc liberates H2 gas when it is treated with dilute HCl ie hydrachloric acid because Zinc is more reactive thn hydrogen so it displaces hydrogen from it 's compound ie HCl and forms Zinc choride ie ZnCl2 wheras copper does not react with dilute hydrochloric acid ie HCl because copper is less reactive than hydrogen so it can 't displace hydrogen from it 's compound.

here is the the reactivity series to make you understand.

Since according to reactivity series of metals Zn is more reactive than hydrogen, Zn displaces hydrogen from HCl and forms H2 and ZnCl2.

Zn+2HCl→ZnCl2+H2

On the other hand copper being less reactive than hydrogen it does not displace hydrogen from HCl.