Question

Does the combination reaction always take place between two elements?

Answer 1

No, combination reaction always does not take place between two elements.

Combination reaction

1. In a combination reaction, two or more compounds or elements or elements and compounds combine to form a single compound.
2. The combination reaction does not always take place between two elements
3. It can take place between two elements, two compounds, or between elements and compounds.

Example:

$N{H}_3\left(g\right)+HCl\left(g\right)\to N{H}_{4}Cl\left(s\right)$

Therefore, combination reactions can take place between compounds and elements and not just elements alone.