Q.

For a reaction AB, enthalpy of reaction is –4.2 kJ mol-1 and enthalpy of activation is 9.6 kJ mol-1. The correct potential energy profile for the reaction is shown in option.        [2021]

1  
2  
3  
4  

Ans.

(3)

As enthalpy of reaction is negative, hence it is an exothermic reaction.