Q.

Is it true that mustard oil floats on water whereas grease settles down in the water?


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a

True

b

False  

answer is A.

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Detailed Solution

The above statement is True.
The materials which are lighter than water, float on the surface of the water and are called floating materials. For example – paper, and dry leaves. The materials which are heavier than water, sink in the bottom and are called sinking materials. For example – stones. Mustard oil is lighter than water hence it floats on the surface of the water while grease is heavier than water thus, it sinks in water.
 
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