Multiple choice

Which of the following is not a mixture?

  1. Air

  2. Pure water

  3. Sea water

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Pure water is a chemical compound consisting of H2O molecules, whereas air and sea water are mixtures of various substances. A mixture contains two or more substances physically combined, while a compound is a pure substance.

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