Question

Which of the following fails to evolve hydrogen gas on reacting with dilute HCl?01
a(Zinc)
b(iron)
c( aluminium)
d(copper)​

Answer 1

Answer:

copper will fail to evolve hydrogen

Explanation:

This is because all other metals are above hydrogen in reactivity series and can displace hydrogen from it's salt solution while copper is below hydrogen so it has low efficiency to displace hydrogen from it's salt solution.

reactivity series is the arrangement of metals in order of reactivity .

Please ask if any doubt.