Question

Which gas is released during photosynthesis?

• A. Nitrogen
• B. Oxygen
• C. Carbon dioxide
• D. Water vapour

Answer 1

The correct option is B

Oxygen

The explanation for the correct option- (B) Oxygen

Photosynthesis- The process by which plants use carbon dioxide and water in presence of sunlight to form sugar(carbohydrate) and oxygen.

$\mathrm{Carbon}\mathrm{dioxide}\left(\mathrm{g}\right)+\mathrm{Water}\left(\mathrm{l}\right)\stackrel{\mathrm{sunlight}}{\to }\mathrm{Glucose}\left(\mathrm{s}\right)+\mathrm{Oxygen}\left(\mathrm{g}\right)$

The plants absorb sunlight with the help of chlorophyll.

The explanation for the incorrect options-

(A) Nitrogen - does not take part in process of photosynthesis.

(C) Carbon dioxide - It is taken from the atmosphere to perform photosynthesis.

(D) Water vapour - It is taken from the atmosphere to perform photosynthesis.

Hence, option (B) is correct. Oxygen gas is released during photosynthesis.