Dimensions of relative density is

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dimensionless

$[{ML}^{- 3}]$

$[{ML}^{- 2}]$

$[M^{2} L^{- 6}]$

answer is C.

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Detailed Solution

The correct answer is dimensionless.

Explanation:

Relative density is the ratio of the density of a substance to the density of a reference substance (usually water). Since it is a ratio of two quantities with the same unit (density), all units cancel out, leaving it without any dimensions. Therefore, relative density is a dimensionless quantity.

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