Specific gravity of substance is

Density of substance relative to density of air

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Density of substance relative to density of water

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Density of substance relative to density of hydrogen

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none of these

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Solution

The correct option is B Density of substance relative to density of water
Relative density, or specific gravity, is the ratio of the density of a substance to the density of a given reference material. Specific gravity for liquids is nearly always measured with respect to water at its densest; for gases, the reference is air at room temperature.
$specific density = \frac{density of unknown material}{density of water}$

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Similar questions

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 $4^{\circ} C$ .
Statement 3: Relative density of a substance is the ratio of the mass of water at $4^{\circ} C$ to the mass of a substance at $4^{\circ} C$ .
Statement 4: Relative density is unitless.

Q. Assertion :Specific gravity is dimensionless quantity. Reason: Specific gravity is relative density of a substance, measured with respect to density of water at

4^{o} C

Q. Assertion :Density of a substance is the ratio of mess of the substance to its volume Reason: Relative density is the ratio of density of substance to the density of water at

4^{o}

Relative density of substance is

The ratio of density of a substance to density of water at 4°C is usually referred as:

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