Question

A reaction involving two different reactants can never be a ______

Options

• second-order reaction

• unimolecular reaction

• bimolecular reaction

• first-order reaction

Answer 1

A reaction involving two different reactants can never be a unimolecular reaction.

Explanation:

In a bimolecular reaction, two different molecules collide before the reaction begins, whereas a unimolecular reaction involves only one reactant molecule. As a result, a reaction involving two different reactants can be bimolecular but not unimolecular. A bimolecular reaction can be either second-order or first-order.