Question

What about sugar and salt ? When kept in different jars these take the space of the jar. Are they solid?

Answer 1

Yes they are most likely solids expect they have these properties of liquid.They are most likely placed in between solids and liquids.But if we zoom into a single particle of sugar or salt we can observe them as a crystal solid which has its definite shape&volume,non compressible........So they are a type of special solids.....
hope it helps....