Question

7) What is pure air? Choose correct option? 1) Nitrogen 2) Oxygen 3) CO2 4) All of them​

Answer 1

Answer:

2)Oxygen is the right answer

Answer 2

•All of them are pure air. 'Pure air' refers to a mixture of gasses in a proper proportion that is suitable for all living beings.

•'Pure air' consists of about 78% of Nitrogen, about 21% of Oxygen and Carbon dioxide, Argon, Methane, Ozone, and water vapor in restricted quantities but they all are in single phases.

•Therefore, they are referred to as a ''Homogeneous mixture".

•Pure air is a mixture of several gases that are invisible and odorless..