Q. Which of the following elements is essential for respiration?

  • (A) Nitrogen
  • (B) Oxygen
  • (C) Carbon dioxide
  • (D) Helium
✅ Correct Answer: (B) Oxygen
Explanation: Oxygen is essential for respiration as it helps in the oxidation of glucose to produce energy.

Published by Sikhar Chaudhary ⭐ 6.79K Points at 06-Oct-2025 06:50 am in Chemistry

Explanation by: Sikhar Chaudhary
Oxygen is essential for respiration as it helps in the oxidation of glucose to produce energy.

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