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Unit - 5.1 Atmosphere and Constituents of air. — CHEMISTRY STD 6 — Question

ICSE BoardEnglish MediumSTD 6CHEMISTRYUnit - 5.1 Atmosphere and Constituents of air.1 Mark
MCQ
The composition of air is:
  • ✓
    78% oxygen, 21% nitrogen and 1% of other gases
  • B
    21% oxygen, 78% nitrogen and 1% of other gases
  • C
    22% oxygen and 78% nitrogen
  • D
    78% of oxygen and 22% nitrogen
✓

Answer

Correct option: A.
78% oxygen, 21% nitrogen and 1% of other gases
A

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