ऑक्सीजन की स्वतंत्र रूप से – McqOptions

MCQOPTIONS

1.	ऑक्सीजन की स्वतंत्र रूप से खोज की थी
A.	नील्स बोहरो
B.	विलियम रामसे
C.	जोसेफ प्रीस्टली
D.	रदरफोर्ड
Answer» B. विलियम रामसे

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