Question

Which of the following metals can displace hydrogen from mineral acids?

(i) Ag

(ii) Zn

(iii) Mg

(iv) Cu

• A. (ii) and (iv)
• B. (i) and (ii)
• C. (ii) and (iii)
• D. (iii) and (iv)

Answer 1

Answer:

C. (ii) and (iii)

Mg (Magnesium)

Magnesium is a reactive metal that can displace hydrogen from mineral acids, such as hydrochloric acid (HCl) and sulfuric acid (H2SO4).

Reaction:

Mg + 2HCl → MgCl2 + H2

Ag (Silver), on the other hand, is a noble metal that does not readily react with mineral acids to displace hydrogen.