Solution→ It is a HOMOGENEOUS mixture.→ The PARTICLES of this solution are smaller than 1 nm (10^-9 m)→ Due to their small size, particles are not visible to the naked eye→ The particles don't settle down at the bottom if left undisturbed, which shows that the mixture is stable. → They don't show TYNDALL effect. ★ Examples :- Sugar dissolved in water, salt solution ETC» Suspension→ It is a heterogeneous mixture→ The particles of this solution are larger than 10^-7 m → Due to their large size, they are visible to naked eyes→ The particles settle down if left undisturbed which shows that they are not stable→ They show Tyndall effect till they settle down, that is, after sedimentation, they don't show Tyndall effect.★ Examples :- Soil mixed with water etc» Colloid→ It seems to be homogenous but it's a heterogeneous mixture→ The size of particle ranges between 10^(-9) to 10^(-7) m→ They are small enough that they are not visible to human eyes→ The particles of this mixture do not settle down, that is, they are quite stable.→ They show Tyndall effect. ★ Examples :- MILK, foam etc