Multiple choice

Which of the following materials sinks in water?

  1. Wax

  2. Sawdust

  3. Sand

  4. Oil
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Only those materials sink in water which are insoluble and are heavier than water, e.g. sand, soil etc. Oil and sawdust are lighter than water and remain at the surface. 

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