Question

Bond formation is always exothermic.
(a) True
(b) False

Answer 1

For these questions, first we have to know what is the meaning of exothermic and then about the nature of heat whether the reaction releases or absorbs heat, if the reaction releases heat while formation of bonds then is it true for all the reactions or for few.

Complete step-by-step answer
We start with the meaning of exothermic:
Exothermic reaction: The type of reaction in which the reaction releases heat, the reaction is known as exothermic reaction.
Now, moving towards the point the whether all the bond formations are exothermic reaction or not:
The bonded atoms are having lower energy than the isolated un-bonded atoms. The existence of the bonds are due to the lower energy state of the bonded atoms in comparison to the isolated atoms. So, to lower the energy or to achieve the more stability the heat should be released. As the formation of bonds increases stability then the reactions are exothermic in nature.
Hence, bond formation is always an exothermic reaction.

Hence, the correct option is (a) True.

Additional Information
There are the two types of reaction, the reaction which releases heat or absorbs heat. With these, reactions are categorised into two types:
(a) Exothermic reaction
(b) Endothermic reaction
(a) Exothermic reaction: The type of reaction in which the reaction releases heat, the reaction is known as exothermic reaction.
(b) Endothermic reaction: The type of reaction in which the reaction absorbs heat, the reaction is known as endothermic reaction.

Note
In all the reactions, during the formation of bonds, the reactants become more stable. To gain higher stability, the energy level must be low. So, to achieve the higher stability and lower energy the reaction should be exothermic.