Question

Assertion (A): Photosynthesis is an endothermic process.

Reason (R): It requires light energy to convert carbon dioxide and water into glucose.

Options

• Both A and R are true and R is the correct explanation of A.

• Both A and R are true but R is not the correct explanation of A.

• A is true but R is false.

• A is false but R is true.

Answer 1

Both A and R are true and R is the correct explanation of A.

Explanation:

The assertion is true because photosynthesis is classified as an endothermic reaction since it cannot occur spontaneously without absorbing energy from its surroundings. The reason is also true and provides the perfect explanation because it identifies the specific source of this absorbed energy: plants capture solar radiant energy (light) to split water molecules and fix carbon dioxide into glucose, directly storing that energy within chemical bonds.