Question

Reactions that take place both in forward and backward directions are called as ______.

• A. irreversible reactions
• B. reversible reactions
• C. endothermic reactions
• D. exothermic reactions

Answer 1

The correct option is B reversible reactions

A reversible reaction is a reaction that can be reversed, i.e., the products can be converted back to the reactants.

For example: $PC{l}_5\leftrightarrows PC{l}_3+C{l}_2$.
In the above reaction the forward reaction is the decomposition of $PC{l}_5$ and the backward reaction is the combination of $PC{l}_3$ and $C{l}_2$. This reaction takes place in both directions.