The particle size in a mixture is 10 nm. Which of the following is not a characteristic of this mixture is

i) Settle only on centrifugation     ii) Do not show Tyndall effect

iii) It is a heterogeneous mixture  iv) Can pass through animal membrane

The particle size in a mixture is 10nm is given in the question. So, the mixture is a colloidal solution mixture. Because the particle diameter range in colloidal solution is 1n.m to100 n.m.

And the given (ii) and (iv) options are not characteristics of colloidal solution. Actually the characteristics are.

(ii) Shows Tyndall effect as colloidal particles scatter light.

(iv) Particles can pass through filter paper.