Approximately what percentage of nitrogen is in the atmosphere? – McqOptions

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1.	Approximately what percentage of nitrogen is in the atmosphere?
A.	78 प्रतिशत
B.	40 प्रतिशत
C.	18 प्रतिशत
D.	25 प्रतिशत
Answer» B. 40 प्रतिशत

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