Theory:

We know what suspension, colloid, and solution are. Now let us see the basic difference between these three.
 
S.No
Property
Suspension
Colloid
Solution
a.
Particle size
\(>100 nm\)
\(1 nm\) to
\(>100nm\)
\(>1 nm\)
b.
Separation process
Possible
Impossible
Impossible
c.
Settling of particles
Settle on their own
Settle on centrifugation
Do not settle
d.
Appearance
Opaque
Translucent
Transparent
e.
Scattering of light
Does not penetrate
Scatters
Does not scatter
f.
Diffusion of particles
Do not diffuse
Diffuse slowly
Diffuse rapidly
g.
Brownian movement
May show
Shows
Does not show
h.
Nature
Heterogeneous
Heterogeneous
Homogeneous