Question

Which of the following is false with respect to activation energy?

• A. Activation energy is required for only endothermic reactions
• B. Activation energy is required for only exothermic reactions
• C. The activation energy can be decreased by enzyme
• D. Both a and b

Answer 1

The correct option is D Both a and b

The minimum amount of energy provided for a chemical reaction to happen is called activation energy. The role of an enzyme is to decrease the activation energy of a particular reaction.
Endothermic reactions are those reactions in which the substrate or reactants absorb energy for the formation of the product.
Exothermic reactions are those reactions in which the substrate or reactants release energy for the formation of the product.
Either exothermic or endothermic, every reaction requires activation energy in order to carry out the reaction. So, both a and b are false.