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Air Around Us — Science STD 6 — Question

CBSE BoardEnglish MediumSTD 6ScienceAir Around Us1 Mark
MCQ
Which of the following statement(s) is/ are correct?
  • A
    In air percentage of nitrogen by volume is $77\%$
  • ✓
    In air percentage of oxygen by volume is $20\%$
  • C
    In air percentage of carbon dioxide is only $2.0\%$
  • D
    In air percentage of water and argon is $1.0\%$
✓

Answer

Correct option: B.
In air percentage of oxygen by volume is $20\%$
In air percentage of oxygen by volume is $20\%$

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