SSC
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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it can be heated to a higher temperature.
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it can be compressed to a smaller volume.
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it is colorless.
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its composition can vary.
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Detailed explanation-1: -Air is a mixture and not a compound because of the following reasons: Air can be separated into its constituents such as oxygen, nitrogen etc. by fractional distillation of liquid air . Air shows the properties of all the gases present in it.
Detailed explanation-2: -Air is said to be a mixture because air at different places contains different amounts of various gases.
Detailed explanation-3: -It consists of 78% nitrogen, 21% oxygen and 1 % other gases and water vapour. The composition of air does not change as you travel through the layers of the atmosphere.
Detailed explanation-4: -The properties of mixture vary because it depends on the type of substance present and on the proportion of the substance being mixed. On the other hand, compounds have a fixed composition and have definite properties.