Answer the following question from the passage below:

The process of accumulation of molecular species at the surface of solid or liquid is called adsorption. It may be physisorption or chemisorption. Low temperature is favorable for physisorption. Amount of gas adsorbed by a solid depends upon nature of gas. Easily liquifiable gases are readily adsorbed. Catalyst increases the rate of reaction. Catalysis may be homogenous or heterogenous Enzymes are biological catalysts. They work at optimum pH and temperature. Solutions are of three types i.e. true solutions, colloids and suspensions. Depending on the interaction between dispersed phase and dispersion medium colloids may be Lyophilic and Lyophobic. Depending on type of particles there may multimolecular, macro-molecular and associated colloids. Sol. gel, emulsions are also various types of colloids.

Match List I with List II

Choose the correct answer from the options given below:

A-II, B-III, C-IV, D-I

The correct answer is option 2. A-II, B-III, C-IV, D-I.

Let us explain why each pair in option 2 (A-II, B-III, C-IV, D-I) is correct:

A. Multimolecular colloid: II. Gold sol: Gold sol is a type of colloid where small particles of gold are dispersed in a solvent. Since the gold particles are relatively small and exist as aggregates, this type of colloid is termed a multimolecular colloid.

B. Macromolecular colloid: III. Polythene: Polythene is a synthetic polymer composed of macromolecules, which are large molecules consisting of repeating subunits. In a colloid of polythene, these macromolecules are dispersed in a medium, making it a macromolecular colloid.

C. Emulsion: IV. Vanishing cream: Vanishing cream is a type of emulsion commonly used in skincare products. It consists of oil droplets dispersed in water or a water-based solution. Since an emulsion involves the dispersion of one liquid in another liquid, vanishing cream fits the description of an emulsion.

D: Lyophilic colloid: I. Starch sol: Starch sol is a colloidal solution in which starch molecules are dispersed in a solvent. Starch molecules have a strong affinity for the dispersion medium, forming stable colloidal solutions. This type of colloid, where the dispersed phase has a strong affinity for the dispersion medium, is known as a lyophilic colloid.

Therefore, option 2 correctly matches each type of colloid (multimolecular, macromolecular, emulsion, and lyophilic) with the corresponding substance (gold sol, polythene, vanishing cream, and starch sol), respectively.