Air is made up of different gases, such as oxygen, nitrogen, and carbon dioxide. Which statement best describes these three components of air?

A)They are all classified as pure substances.

B)They cannot react with another substance.

C)They are chemically bonded to one another.

D)They can be classified as elements.

Question

Air is made up of different gases, such as oxygen, nitrogen, and carbon dioxide. Which statement best describes these three components of air? 

A)They are all classified as pure substances.

B)They cannot react with another substance.

C)They are chemically bonded to one another.

D)They can be classified as elements.

aaronq · Answer

Can you eliminate any of the options?

anonymous · Answer

A

midhun.madhu1987 · Answer

A)They are all classified as pure substances.

anonymous · Answer

if A is right,we can separate one of those components in pure form.
am I right @midhun.madhu1987 ?

midhun.madhu1987 · Answer

Only by chemical methods we can separate them...

anonymous · Answer

yup

aaronq · Answer

you can separate these gases based on their boiling points, by cooling the mixture and condensing them out.