Question

Which of the following is not the unit of density?

• A. $kg{m}^{-3}$
• B. $g{m}^{-3}$
• C. $gc{m}^{-3}$
• D. $gc{m}^{-2}$

Answer 1

The correct option is D

$gc{m}^{-2}$

Density:

1. Density is the ratio of mass per unit volume.
2. Mathematically; $Density=\frac{mass}{Volume}$
3. So, the S.I. unit of density is $kg/m^3$
4. Other units of density are $g{m}^{-3}$and $gc{m}^{-3}$.

Hence, $gc{m}^{-2}$ is not the unit of density. Option D is correct.