Question

The SI unit of relative density is

• A. $kg/c{m}^3$
• B. $kg/c{m}^3$
• C. $g/c{m}^3$
• D. No unit

Answer 1

The correct option is D No unit

Relative density
$RD=\frac{\text{Density of a substance}}{\text{Density of water at}{4}^{\circ }C}$
As it is the ratio of same physical quantities and so the units in the numerator cancels out with the units in the denominator and so it has not unit.