What do you mean by volume of gases?
Definite
Almost nil
Large
Take the volume of container.
A gas completely occupies the container in which it is placed because the inter molecular force of attraction is very weak.
What do you mean by the statement - 1kg of sugar occupies more volume than 1 kg of iron.
Why do solids have a definite volume ?
Liquids have a definite volume but do not have a definite shape.