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Question

Which of the following statement(s) is/are true about relative density?
Statement 1: Relative density is known as the specific gravity of the substance.
Statement 2: Relative density of a substance is the ratio of the density of the substance to the density of water at 4C.
Statement 3: Relative density of a substance is the ratio of the mass of water at 4C to the mass of a substance at 4C.
Statement 4: Relative density is unitless.


A

Statement 1

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B

Statement 2

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C

Statement 3

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D

Statement 4

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Solution

The correct option is D

Statement 4


The relative density of a substance is defined as the ratio of the density of the substance to the density of water at 4C. Relative density is also known as the specific gravity of the substance. The relative density of a substance can also be defined as the ratio of the mass of a substance to the mass of the water if the volume of water at 4C and volume of substance is same. Since relative density is the ratio of two densities, thus it has no unit.


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