Question

Match the following List I with List II with respect to most specific Activity / Property in formulation of disperse system

	List I Formulation Ingredient		List II Activity / Property
	Salts of d-glu- curonic acid poly-peptides and amino acids		Are pseudoplastic and plastic in nature
	Surfactants, both ionic and non-ionic		Form a multimolecular film around the dispersed droplets of oil in an o/w emulsion
	Magnesium aluminium silicate		Emulsifier belonging to the class of solid particles forms w/o emulsions
	Structured vehicles		Emulsifier belonging to the class of solid particles and forms o/w emulsion
			Have been used to bring about flocculation of suspended particles

Choose the correct answer from the options given below:

• A. A-II, B-V, C-IV, D-I
• B. A-V, B-IV, C-II, D-I
• C. A-V,B-IV,C-II, D-I
• D. A-IV, B-III, C-II, D-I

Answer 1

The Correct Option is B

The problem requires matching substances (List I) with their specific properties or activities related to the formulation of disperse systems (List II). Understanding these materials helps us identify their activities in emulsions.

1. Salts of d-glucuronic acid poly-peptides and amino acids: These are often involved in complex reactions that can lead to flocculation of particles within formulations. Typically, they modify the surface charge of particles, promoting their attraction. Hence, they match with V: Have been used to bring about flocculation of suspended particles.
2. Surfactants, both ionic and non-ionic: Surfactants surround and stabilize dispersed droplets, specifically in emulsions. They can form structures around droplets and commonly form emulsions by creating a film. Therefore, they match with IV: Form a multimolecular film around the dispersed droplets of oil in an o/w emulsion.
3. Magnesium aluminium silicate: This compound belongs to a category known for forming water-in-oil (w/o) emulsions. It acts as an emulsifying agent by forming a barrier around dispersed phases. Therefore, it matches with II: Emulsifier belonging to the class of solid particles forms w/o emulsions.
4. Structured vehicles: These are formulations that can exhibit non-Newtonian behaviors such as pseudoplastic or plastic flow, supporting various types of dispersions. They stabilize and support the formation of emulsions, often behaving in a structured manner. Thus, they match with I: Are pseudoplastic and plastic in nature.

Given this analysis, the correct matches are as follows:

1. A-V: Salts of d-glucuronic acid poly-peptides and amino acids - Have been used to bring about flocculation of suspended particles.
2. B-IV: Surfactants, both ionic and non-ionic - Form a multimolecular film around the dispersed droplets of oil in an o/w emulsion.
3. C-II: Magnesium aluminium silicate - Emulsifier belonging to the class of solid particles forms w/o emulsions.
4. D-I: Structured vehicles - Are pseudoplastic and plastic in nature.

Hence, the correct answer is: A-V, B-IV, C-II, D-I.