Question

Select the correct alternative.

Which of the following reactions are exothermic in nature?

• A. Combustion of Carbon
• B. Bond breaking
• C. Bond formation
• D. Both (a) and (c)

Answer 1

The correct option is D Both (a) and (c)

Combustion or burning is a high-temperature exothermic redox chemical reaction between fuel and oxidant oxygen. Bond breaking requires energy to be supplied for bond dissociation so it is an endothermic process while bond formation releases energy so that the product becomes stable which is an exothermic process.