Beaker ‘A’ has chalk powder mixed with water and beaker ‘B’ has protein dissolved in water.

i) Which solution shows Brownian movement?

ii) Identify the solution that has particle size greater than 2000Å

iii) Which beaker contains colloidal solution?

iv) Mention the size of the particle present in beaker B.

v) Say whether colloidal solution is homogeneous or heterogeneous

i) Beaker B

Explanation: Chalk powder mixed with water is a suspension solution and protein dissolved in water is a colloidal solution. Brownian movement is a phenomenon of continuous random motion of colloidal particles. Therefore, beaker B shows Brownian movement.

ii) Solution in beaker A

Explanation: suspension solutions have particle size greater than 2000Å and colloidal solutions have particle size of 10Å to 2000Å. There the suspension solution present in beaker A has particle size greater than 2000Å.

iii) Beaker B

Explanation: The chalk powder dissolved in water gives a heterogenous mixture of suspended chalk particles in water whereas the protein dissolved in water gives a heterogenous mixture which is translucent in appearance. Therefore, beaker B has colloidal solution in it.

iv) Since the solution present in beaker B is a colloidal solution so the size of the particles of beaker B is 10Å to 2000Å

v) Colloidal solution is a heterogenous mixture. The composition is not uniform throughout the mixture. It consists of two phases: dispersed phase and dispersing medium. The substance distributed as particles is called dispersed phase and the phase in which these particles are distributed is known as dispersing medium.