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सामान्य ज्ञान
: विज्ञान
वायु में नाइट्रोजन और ऑक्सीजन का प्रतिशत कितना है? , What is the percentage of nitrogen and oxygen in air ?
वायु में नाइट्रोजन और ऑक्सीजन का प्रतिशत कितना है?
What is the percentage of nitrogen and oxygen in air ?
A. 98%
B. 99%
C. 97%
D. 100%
Correct Answer :
B. 99%
Explanation
Nitrogen and oxygen is 99% in air.
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