Choose the correct answer

_______ and ______ are the two gases, which when taken together, make up about 99 percentage of air.I.Nitrogen II. carbon-di-oxide III. Noble gases IV. Oxygen

- a. I and II

- b. I and III

- c. II and IV

- d. I and IV

Correct Answer:

d. I and IV

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Answered on 03/08/2020 at 07:36AM by Thamizh

Correct Answer:

Option: d. I and IV

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Video Explanation

Answered on 10/08/2021 at 01:07PM by Sangeedha Ezhilan