Question

On increasing the temperature of the reacting system by 10^o the rate of reaction becomes almost double. The most appropriate reason for this is

• A. The fraction of molecules having threshold energy increases
• B. Collision frequency increases
• C. The value of threshold energy decreases
• D. Activation energy decreases by increase of temperature

Answer 1

The correct option is A

The fraction of molecules having threshold energy increases

In a chemical reaction there is an energy barrier between the reactants and the products. To overcome this barrier energy is required. The increase in temperature increases the kinetic energy of the molecules. Hence it increases the fraction of molecules having threshold energy and helps them to overcome the energy barrier.