Question

Zn + 2HCl → ZnCl2 + H2 ↑
The above reaction is an example of ______ .
i) Combination reaction ii) Double displacement reaction
iii) Displacement reaction iv) Decomposition reaction.

Answer 1

Zn + 2HCl → ZnCl2 + H2 ↑

The above reaction is an example of displacement reaction.

This type of a reaction is a chemical reaction where a more reactive element displaces a less reactive element from its compound.

In this situation both the metals and non-metals take part in displacement reactions which can be represented generically as A + B-C → A-C + B if A is more reactive than B, thus giving a more stable product.

And a displacement reaction is also known as a replacement reaction or a metathesis reaction.