Question

. Which one of the following is not a mixture?


a) Brass


c) 22 carat gold


b) Air


d) Water

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Answer 1

Explanation:

22 carat gold not a mixture.

Answer 2

Water is not a mixture.

• A mixture contains two or more substances.
• Brass is an alloy of various metals so, it is a mixture.
• 22-carat gold is not pure gold. It contains other metals like copper, silver etc so, it is a mixture.
• Air is a mixture of various gases, dust etc so, it is a mixture.
• Water is a pure liquid. It contains only one substance so it is a mixture.
• The correct option is d.