Question

Classify the following things into substances having Relative Density $>1$ and Relative Density $<1$. Wood, iron, rubber, plastic, glass, stone, cork, air, coal, ice, wax, paper, milk, kerosene, groundnut oil, soap.

Answer 1

Based on whether they sink (R.D $>1$) or float (R.D $<1$) in water:

Relative Density $>1$:

Iron ,Rubber,Glass,Stone,Coal,Paper,Milk,Soap

R.D $<1$:

Wood,Plastic,Cork,Air,Ice,Wax ,Groundnut Oil,Kerosene