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 $4^{o}$

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Density of a substance is defined as the mass of the substance per unit volume and Relative density is the ratio of density of substance to that of water.
Density = $\frac{m a s s}{V o l u m e}$ Relative Density = $\frac{d e n s i t y o f s u b s t a n c e}{d e n s i t y o f w a t e r}$ .

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