Question

What will you observe when copper ($Cu$) is kept in hydrochloric acid ($HCl$)?

• A. Slow release of $H_2$ gas
• B. Vigorous release of $H_2$ gas
• C. Release of water in the form of vapour.
• D. No reaction

Answer 1

The correct option is D No reaction

The reactivity series follows the order:

$Pb>H>Cu$

Thus, $Cu$ is below hydrogen and can't displace it. Therefore, no reaction would take place between $Cu$ and $HCl$.