Question

How is a suspension different from a colloid?

Answer 1

A suspension is defined as a heterogenous mixture of particles with a diameter greater than 1000 nm such that the particles are visible to naked eyes. Eg : muddy water, etc

A Colloid is an intermediate between solution and suspension. It has particles with sizes between 2 to 1000 nanometers. A colloid is easily visible to naked eye. Colloids can be distinguished from solutions using Tyndall effect.

The main differnces are

Colloids.	Suspension
Homogeneous	Heterogeneous
size 1-1000 nm	particle size above 1000nm
Particles can be removed by ultrafiltration	Particles can be removed by filtration.
Particles dont settle easily	Particles settle easily.
Tyndall effect	may or maynot show tyndall effect.
Translucent	Opaque
Particles not easily seen through naked eye	particles seen through naked eye