Q.

Which of the following liquids has the least density?

A. Fresh water
B. Salt water
C. Petrol
D. Mercury
Answer» C. Petrol
Explanation: Gasoline or petrol is a transparent, petroleum-derived liquid that is used primarily as a fuel in internal Combustion engines. It consists mostly of organic compounds obtained by the fractional distillation of petroleum, enhanced with a variety of additives.
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