Question

Which of the following is a mixture?

• A. The solution of gold
• B. Air
• C. Water
• D. Sugar

Answer 1

The correct option is B

Air

Answer:

Mixture:

• In chemistry, when two or more substances are mixed in any without having any chemical change, then the final substance is known as a Mixture.
• For example a mixture of water and sugar.
• The components of a mixture are not present in it in a fixed ratio.

Compound:

• A pure substance constituted of two or more elements combined chemically in a fixed ratio is called a compound.

The explanation for the correct answer:

Option B: Air

• Air is nothing but a mixture of gases like Nitrogen$\left(78\%\right)$ , mixed with Oxygen $\left(21\%\right)$, Water vapor, Argon (0.9%), Carbon dioxide (0.04%), and dust particles.
• Hence air is an example of a mixture.
• So, option B is the right answer.

The explanations for the incorrect answers:

Option A: The solution of Gold$\left(\mathrm{Au}\right)$

• The solution of gold is melted form of the element Gold. We can not split it into two different substances.
• Hence gold is not an example of a mixture.
• So, option A is the wrong answer.

Option C: Water $\left({\mathrm{H}}_2\mathrm{O}\right)$

• Water is a compound made up of the combining of the elements hydrogen and oxygen in a fixed ratio.
• Hence the water is not an example of a mixture.
• So, option C is the wrong answer.

Option D: Sugar $\left({\mathrm{C}}_{12}{\mathrm{H}}_{22}{\mathrm{O}}_{11}\right)$

• Sugar is a compound made up of the combining of the elements carbon, hydrogen, and oxygen in a fixed ratio.
• Hence sugar is not an example of a mixture.
• So, option D is the wrong answer.

Conclusion:

• So, the air is an example of a mixture.
• So, option B is the right answer.