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JEE Main 202227 JuneMorning Shift
Exam
JEE Main
Year
2022
Date
27 June
Shift
Morning Shift
Subject
Chemistry
Chapter
Surface Chemistry

JEE Main 2022 · 27 June · Morning Shift · Chemistry · Surface Chemistry

Match List - I with List - II. List-I List-II A Lyophilic colloid I...

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 FeCl3+NaOH{FeCl}_{3} + NaOH
D Negatively charged colloid IV FeCl3+{FeCl}_{3} + hot water

Choose the correct answer from the options given below

Options

  1. A(A)−(II),(B)−(I),(C)−(IV),(D)−(III)\left(A\right) - \left(II\right), \left(B\right) - \left(I\right), \left(C\right) - \left(IV\right), \left(D\right) - \left(III\right)
  2. B(A)−(III),(B)−(I),(C)−(IV),(D)−(II)\left(A\right) - \left(III\right), \left(B\right) - \left(I\right), \left(C\right) - \left(IV\right), \left(D\right) - \left(II\right)
  3. C(A)−(II),(B)−(I),(C)−(III),(D)−(IV)\left(A\right) - \left(II\right), \left(B\right) - \left(I\right), \left(C\right) - \left(III\right), \left(D\right) - \left(IV\right)
  4. D(A)−(III),(B)−(II),(C)−(I),(D)−(IV)\left(A\right) - \left(III\right), \left(B\right) - \left(II\right), \left(C\right) - \left(I\right), \left(D\right) - \left(IV\right)

Correct answer

A. (A)−(II),(B)−(I),(C)−(IV),(D)−(III)\left(A\right) - \left(II\right), \left(B\right) - \left(I\right), \left(C\right) - \left(IV\right), \left(D\right) - \left(III\right)

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 FeCl3{FeCl}_{3} is added to the excess of hot water, a positively charged sol of hydrated ferric oxide is formed due to adsorption of Fe3+{Fe}^{3 +} ions. However, when ferric chloride is added to NaOHNaOH solution, a negatively charged sol is obtained with adsorption of OH−{OH}^{-} ions.

Fe2O3⋅xH2O/Fe3+{Fe}_{2}{O}_{3} \cdot {xH}_{2}O / {Fe}^{3 +}
Positively charged

Fe(OH)3/OH−Fe{\left(OH\right)}_{3} / {OH}^{-}
Negatively charged

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