By volume, dry air contains …………………percentage oxygen.

May 5, 2021 – by admin

Question:

By volume, dry air contains …………………percentage oxygen.

A.

20.95%

B.

0.93

C.

78.09

D.

0.04%

Answer» a. 20.95%

Note:

The above multiple-choice question is for all general and Competitive Exams in India.