When we add little kerosene to the water taken in a boiling tube we observe that kerosene is floating on water surface. If we drop objects like plastic buttons, pins, match sticks, small pebbles, tiny paper balls, some sand and bits of wax etc. then

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We observe objects like pebbles, sand sink completely in to the water

We observe objects like match sticks, plastic buttons sink in kerosene but float on water

We observe objects like tiny paper balls, and bits of wax float on kerosene

All the above

answer is D.

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Detailed Solution

We observe objects like pebbles, sand sink completely in to the water.

We observe objects like match sticks, plastic buttons sink in kerosene but float on water.

We observe objects like tiny paper balls, and bits of wax float on kerosene.

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