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Why is air called both gas and mixture?

Answer and explanation

Correct answer: It is gaseous in state and made of many gases

The governing concept is that matter can be classified in two different ways: by physical state and by composition. Air is called a gas because, at ordinary conditions, it has no fixed volume, fills its container, and is in the gaseous state. It is called a mixture because it contains several gases, mainly nitrogen and oxygen, along with smaller and variable amounts of argon, carbon dioxide, water vapour, and other components. These gases are not chemically combined in one fixed ratio, and air can be separated by physical methods. Hence option A gives both required reasons. Air is not a pure element, not a liquid compound, and it certainly has mass.

Related tags

ChemistryNature-Of-MatterAirMixturesClass-11Nature Of MatterSome Basic Concepts Of ChemistryClass 11 Mcq

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