Question
Is a pure substance?
Answer (Detailed Solution Below)
The correct answer is Methane
Pure substance is defined as which consists of only one type of atom. It has a fixed and definite structure. It has a uniform composition.
Methane is a pure substance.
- A sugar solution is a homogeneous mixture. Its chemical formula is C12H22O11. It comprises carbon, hydrogen and oxygen molecules. That is why it is not a pure substance.
- Milk is made up of multiple substances, including water, fat, protein, sugar, vitamins and calcium. It can split into two or more substances. That is why it is not a pure substance.
- Air is made up of many different gases, including nitrogen, oxygen, argon, carbon dioxide, methane and nitrous oxide. That is why air is not a pure substance.
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