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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