Science · Chemistry
पृथ्वी के वायुमंडल का लगभग 78% भाग कौन सी गैस है?
- 1ऑक्सीजन
- 2कार्बन डाइऑक्साइड
- 3नाइट्रोजन✓
- 4हीलियम
सही उत्तर देखें
नाइट्रोजन
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