From the given choices, let's choose the correct statement.
Endothermic process can be said to be a reaction where energy is taken in from the surroundings. In this process there is a decrease in the surroundings temperature.
Exothermic process can be said to be a reaction whereby energy is transferred to the surroundings.
Let's verify each statement starting from option A.
• A. Breaking bonds is endothermic.
In bond breaking, energy is required. Hence, we can say it is an endothermic process.
This statement is correct.• B. Making bonds is exothermic.
In making of bonds, energy is released. Since energy is released, we can say bond making is an exothermic process.
This statement is correct.• C. Making bonds is endothermic.
With reference to option B above, bond making is an exothermic process not an endothermic process.
This statement is INCORRECT.
• D. Breaking bonds is exothermic.
With reference to option A, bond breaking is an endothermic process and not exothermic.
This statement is INCORRECT.
Therefore, the correct statements are:
• A. Breaking bonds is endothermic
,
• B. Making bonds is exothermic
ANSWER:
• A. Breaking bonds is endothermic
,
• B. Making bonds is exothermic