What is the S.I unit of relative density?

A. kg m−²
B. kg m²
C. kg cm³
D. has no S.I unit

Correct Answer:

Option D – has no S.I unit

Explanation

Note: relative density has no S.I unit

∴ Relative density = weight of substance ÷ weight of equal volume of water

RD = w1 ÷ (w1 – w2) (no S. I unit)