6 years ago in Mixed

What chemical element makes up one-fifth of the volume of the air ?

[A] Helium
[B] Hydrogen
[C] Nitrogen
[D] Oxygen
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Attempted 29
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Answers

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Mahfooz Alam
Mahfooz Alam - 10 months ago

Mahfooz Alam from Patna, India is saying Hydrogen is correct answer

Sandeep Shirsat
Sandeep Shirsat - 1 year ago

Sandeep Shirsat from Mumbai, India is saying Helium is correct answer

Manvendra Singh Rawat
Manvendra Singh Rawat - 1 year ago

Manvendra Singh Rawat from Delhi, India is saying Oxygen is correct answer

Sunil Kumar R
Sunil Kumar R - 1 year ago

Sunil Kumar R from Bengaluru, India is saying Helium is correct answer

JnanaRanjanMohanty
JnanaRanjanMohanty - 1 year ago

JnanaRanjanMohanty from Cuttack, India is saying Oxygen is correct answer

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