Question

Raghu while performing experiments found that the speed of the chemical reaction increases as the surface area of the reactant is increased. Why is it happening so?

• A. This change increases the density of the reactant particles.
• B. This change increases the concentration of the reactant.
• C. This change exposes more reactant particles to possible collisions.
• D. This change alters the electrical conductivity of the reactant particle.

Answer 1

The correct option is C This change exposes more reactant particles to possible collisions.

In a chemical reaction when there is an increase in surface area of the reactant then the number of particles available for collision increases. As a result, the rate of the reaction increases.