ESS
Grade-10
Easy
Question
What are ‘A’ and ‘B’ in the diagram given below.
- A – Nitrogen 21%, B – Carbon dioxide 79%
- A – Oxygen 21%, B – Nitrogen 79%
- A – Nitrogen 78%, B – Oxygen 21%
- A – Nitrogen 78%, B – Argon .01%
The correct answer is: A – Nitrogen 78%, B – Oxygen 21%
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