Argon is the third largest constituent of air (followed by N 2 & O 2 ) – McqOptions

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1.	Argon is the third largest constituent of air (followed by N 2 & O 2 ). Its percentage by volume in air is
A.	0.14
B.	0.34
C.	0.94
D.	1.4
Answer» D. 1.4

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