Question

Which of the following would increase the rate of this chemical reaction N2(g) + 3H2(g) ---> 2NH3(g)

I Reduce the temperature

II Decrease the volume

III Introduce a catalyst



I only


I and II


II and III


III only

Answer 1

Decrease in temperature

Addition of catalyst (Fe)

Answer 2

III only

Step-by-step explanation:

The rate of a chemical reaction (when reactant particles are gases) is increased by the following factors

• increase in temperature
• increase in pressure
• addition of catalyst

The only correct option from the question is III

A catalyst increases the rate of chemical reaction by reducing the activation energy of the reaction. Activation energy is the minimum amount of energy required for a reaction to occur. So, when the activation energy is lowered, the time required to complete a reaction reduces, hence the rate of reaction increases.