Question

(a) Compare the properties of solids, liquids and gases in tabular form.
​(b) Give two reasons for saying that wood is a solid.

Answer 1

(a)

Property	Solid	Liquid	Gas
Packing of particles	Particles are packed very close to each other.	Particles are packed less close to each other.	Particles are packed very far from each other.
Force of attraction between the particles	Strongest	Weaker than solids.	Negligible
Shape and volume	Fixed shape and volume.	No fixed shape but fixed volume.	Neither fixed shape nor fixed volume.
Compressibility	Negligible.	Higher than solids.	Highest.
Rate of diffusion	Very low	Higher than solids.	Highest.

(b) Wood is solid because:
(i) It has a fixed shape and volume.
(ii) It cannot be compressed.