V 4)ਵਾਯੂ ਮੰਡਲ ਵਿਚ ਕਿਨੇ % ਆਕਸੀਜ – InterviewSolution

1.	V 4)ਵਾਯੂ ਮੰਡਲ ਵਿਚ ਕਿਨੇ % ਆਕਸੀਜ਼ਨ 2/2 ਹੈ ? (What% oxygen is in the atmosphere?) * O 20% O 30% O 23% 21% ✓
Answer» CENT OXYGEN in the ATMOSHPHERE

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