Q. The proportion of nitrogen in dry air is

  • (A) 21% by volume
  • (B) 21% by weight
  • (C) 50% by weight
  • (D) 78% by volume
✅ Correct Answer: (D) 78% by volume

Published by Priyanka Tomar ⭐ 35.28K Points at 08-Jun-2021 06:00 am in Geography

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