Question

Which of the following is an example of displacement reaction?
4 Na+ O2 → 2 Na2O
2 Cu + O2 → 2 CuO
Mg + 2 HCl → MgCl2 + H2
N2 + 3 H2 → 2 NH3​

Answer 1

Answer:

1st option 4 Na+ O2 → 2 Na2O

i think...

Explanation:

hope you understand the answer

Answer 2

Answer:

Mg(s) +2HCl(aq)➡️MgCl2 (aq)+H2 (g)

Explanation:

Magnesium metal reacts with hydrochloric acid to form magnesium chloride and hydrogen gas. This reaction represents a displacement reaction. Magnesium metal displaces Hydrogen from HCl.