1
Question
Air is not a pure substance.
Air is not a pure substance.
Open in App
Solution
The correct option is A True
Air, when considered in its gaseous form contains different proportions of other gases like oxygen, nitrogen etc., along with humidity and water vapour. All these components are not in fixed proportions, so air cannot be a mixture.
A pure substance is one which has the same chemical composition in all its phases. For example, the chemical composition of water is H2O whether as ice, as water or as steam/vapour. Hydrogen & Oxygen are in a constant ratio.
True
Air, when considered in its gaseous form contains different proportions of other gases like oxygen, nitrogen etc., along with humidity and water vapour. All these components are not in fixed proportions, so air cannot be a mixture.
A pure substance is one which has the same chemical composition in all its phases. For example, the chemical composition of water is H2O whether as ice, as water or as steam/vapour. Hydrogen & Oxygen are in a constant ratio.