When chemicals A and B are mixed, the energy of the old bond has been more than the energy of the new substance. The reaction has been marked as an exothermic reaction. Thus Option B is correct.
An exothermic reaction is one in which the energy has been released by the chemical reaction. The chemical reaction can be symbolized by the rise in the temperature, depicting the exothermic reaction.
In the exothermic reaction, the energy released by the bond-breaking has been higher than the energy required for the formation of the new bonds. The extra energy has been released by the reaction.
Thus in the exothermic reaction, more energy has been released from the old substance as compared to the energy required for new substance chemical bonds. Thus option B is correct.
For more information about the exothermic reaction, refer to the link:
https://brainly.com/question/10373907
