Question

When firewoods are cut into small pieces then the rate of the reaction increases. Which of the following factor is mainly responsible for it?

• A. An increase in concentration
• B. A decrease in concentration
• C. An increase in surface area
• D. A decrease in the surface area

Answer 1

The correct option is C An increase in surface area

The rate of the reaction determines the speed by which the chemical reaction proceeds. The factors which affect the rate of the reaction are:

1. The concentration of the reactants
2. The nature of the reactants
3. The surface area of the solid reactants
4. The temperature of the reaction
5. Presence of a catalyst and light

The factor which is affecting the rate of the reaction here is the surface area. When firewoods are cut into small pieces then more surface area is exposed for the reaction to occur. Hence, the speed of reaction is faster.