Question

Beaker ${}^{\prime }{A}^{\prime }$ has chalk powder mixed with water and beaker ${}^{\prime }{B}^{\prime }$ has protein dissolved in water.
i) Which solution shows Brownian movement?
ii) Identify the solution that has the particle size greater than $2000\stackrel{\circ }{A}$.
iii) Which beaker contains colloidal solution?
iv) Mention the size of the particle present in beaker $B$.
v) Say whether colloidal solution in homogeneous or heterogeneous

Answer 1

Beaker A has chalk powder not completely dissolved in water.

Beaker B has protein in water which is a colloidal solution.

(i) The Brownian movement will be shown by colloidal solution in Beaker B.

(ii) Particle size is greater than $2000\stackrel{o}{A}$ for solution having less soluble solute. This is applicable for Beaker A.

(iii) Protein in water i.e. Beaker B has a colloidal solution.

(iv) Beaker B has a particle size in colloidal range i.e. $1$ to $100nm$.

(v) A colloidal solution is heterogeneous as the components do not get completely mixed, and that such a solution is not transparent.