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Match List - I with List - II. List-I List-II A Lyophilic colloid I Liquid-liquid colloid B Emulsion II Protective colloid C Positively charged colloid III FeCl 3 + NaOH D Negatively charged colloid IV FeCl 3 + hot water Choose the correct answer from the options given below

Options

  1. AA - II , B - I , C - IV , D - III
  2. BA - III , B - I , C - IV , D - II
  3. CA - II , B - I , C - III , D - IV
  4. DA - III , B - II , C - I , D - IV

Correct answer

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

Step-by-step solution

Lyophilic colloids are stable due to charge and solvation, they can be used to protect Lyophobic colloids Emulsions are liquid-liquid type of colloids If FeCl 3 is added to the excess of hot water, a positively charged sol of hydrated ferric oxide is formed due to adsorption of Fe 3 + ions. However, when ferric chloride is added to NaOH solution, a negatively charged sol is obtained with adsorption of OH - ions. Fe 2 O 3 · xH 2 O / Fe 3 + Positively charged Fe OH 3 / OH - Negatively charged

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