Which gas is released during photosynthesis?
Answer and explanation
Correct answer: A. Oxygen
- Step 1: During the light-dependent reactions of oxygenic photosynthesis in green plants, chlorophyll absorbs light energy to split water molecules in a process called photolysis: .
- Step 2: The overall photosynthetic reaction () releases oxygen gas into the atmosphere as a vital byproduct.
Answer
Oxygen.
Why not the others: Carbon dioxide is consumed during the Calvin cycle; Hydrogen is used in reduction; and Methane is produced by anaerobic methanogens.
Practise more Science essentials.
Free questions with an explanation for every one, and full timed CBSE Class 10 mock tests.
More Science essentials questions
- Which gas is evolved when a metal reacts with a dilute acid?
- What is the pH of a neutral solution at 25 °C?
- Which type of lens is used to correct myopia (short-sightedness)?
- What is the SI unit of electric current?
- The reaction Fe + CuSO₄ → FeSO₄ + Cu is an example of a
- Which non-metal is a liquid at room temperature?