The correct relation is:

1. Density = Mass x Volume
2. Mass = Density x Volume
3. Volume = Density x Mass
4. Density = Mass + Volume

The relative density of alcohol is 0.8. Its density is:

1. 0.8
2. 800 kg m^-3
3. 800 g cm^-3
4. 0.8 kg m^-3

The density of aluminium is 2.7 g cm^-3 and that of brass is 8.4 g cm^-3. The correct statement is:

1. Equal masses of aluminium and brass have equal volumes.
2. The mass of a certain volume of brass is more than the mass of equal volume of aluminium.
3. The volume of a certain mass of brass is more than the volume of equal mass of aluminium.
4. Equal volumes of aluminium and brass have equal masses.

A density bottle has a marking 25 mL on it. It means that:

1. the mass of density bottle is 25 g.
2. the density bottle will store 25 mL of any liquid in it.
3. the density bottle will store 25 mL of water, but more volume of liquid denser than water.
4. the density bottle will store 25 mL of water, but more volume of a liquid lighter than water.