True and false

1. The density of gases is more than that of solids.
2. The volume of any liquid completely filled in a relative density bottle remains the same.
3. We need to know only the mass of the substance to determine its relative density.
4. Kerosene is lighter than water.
5. The density of a substance is the ratio of its density to the density of water at 4°C.

Dear Student. 1.False. - The molecules in solids are closely bound so they have higher density while in liquids the molecules are loosely bound thus having lower density. 2.True. - Liquids does not change volume from container to container. 3.False - Density = Mass /volume. 4.True.- The density of kerosene is less than that of water.As density is directly proportional to mass ,so it's lighter than water. 5.False.- It's relative density. For rest of the questions post in another portal. Thank You