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Question

Which of the following is/are NOT solution(s)?


A

brass

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B

ocean water

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C

air

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D

carbon dioxide

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Solution

The correct option is D

carbon dioxide


Carbon dioxide is not a solution because it is not a mixture. It has only particles of CO2, so, it is a compound. A compound is made up of only one kind of particles. For example, water is a compound as it comprises only H2O particles.

Brass, an alloy, is a solid solution of copper and zinc. Air is a gaseous homogeneous mixture containing a lot of gases. Whereas the ocean water is a liquid solution that contains lots of salts.


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