Question

Relative density is a unitless physical quantity.​

Answer 1

Answer:

If the relative density is exactly 1 then the densities are equal; that is, equal volumes of the two substances have the same mass.

Answer 2

Answer:

Relative density is the ratio of two densities i.e. density of substance to density of water at 4degree Celsius .Since relative density is a pure ratio and ratio do not have any unit so it is a unit less physical quantity..