Question

Which metal will produce H2 gas when added to a solution containing a strong acid?

a. Cu(s)
b. Ag(s)
c. Au(s)
d. Zn(s)

Answer 1

Zn(s) produces H₂ when is added to a strong acid solution

Step-by-step explanation:

Look at this example:

2Zn (s) + 2HCl (aq) → 2ZnCl (aq) + H₂ (g)

It is a redox reaction, where the zinc is oxidized and the H, reducted.

Zn → Zn⁺ + 1e⁻

2H⁺ + 1e⁻ → H₂