Question

Classify the following reaction as:

${\mathrm{H}}_2+{\mathrm{I}}_2\rightleftharpoons 2\mathrm{HI}$

(i) Chemical combination or synthesis.

(ii) Chemical decomposition reaction.

(iii) Double decomposition reaction.

(iv) Displacement or substitution reaction.

(v) Neutralization reaction.

(vi) Reversible reaction.

(vii) Photochemical reaction.

(viii) Isomerisation or rearrangement reaction.

Answer 1

Reversible reaction:

• It is defined as a chemical reaction where the reactants and the products react together to give the reactants back.
• In a reversible reaction, both forward and backward directions of the reaction generally occur at the same time.

For example:

${\mathrm{H}}_2+{\mathrm{I}}_2\rightleftharpoons 2\mathrm{HI}$