JEE-MAIN SERIES Chemistry
Classification Of Colloids
6 previous year questions.
Volume: 6 Ques
Yield: Medium
High-Yield Trend
3
2023 2
2022 1
2019 Chapter Questions 6 MCQs
01
PYQ 2019
medium
chemistry ID: jee-main
Peptization is a :
1
process of converting a colloidal solution into precipitate
2
process of converting precipitate into colloidal solution
3
process of converting soluble particles to form colloidal solution
4
process of bringing colloidal molecule into solution
02
PYQ 2022
easy
chemistry ID: jee-main
Which of the following is a correct statement?
1
Brownian motion destabilises sols.
2
Any amount of dispersed phase can be added to emulsion without destabilising it.
3
Mixing two oppositely charged sols in equal amount neutralises charges and stabilises colloids.
4
Presence of equal and similar charges on colloidal particles provides stability to the colloidal solution.
03
PYQ 2022
medium
chemistry ID: jee-main
Using very little soap while washing clothes, does not serve the purpose of cleaning of clothes, because:
1
soap particles remain floating in water as ions.
2
the hydrophobic part of soap is not able to take away grease.
3
the micelles are not formed due to concentration of soap, below its CMC value.
4
colloidal structure of soap in water is completely distributed.
04
PYQ 2023
medium
chemistry ID: jee-main
Adding surfactants in non polar solvent, the micelles structure will look like
1
d
2
c
3
b
4
a
05
PYQ 2023
hard
chemistry ID: jee-main
For micelle formation, which of the following statements are correct?
(A) Micelle formation is an exothermic process
(B) Micelle formation is an endothermic process
(C) The entropy change is positive
(D) The entropy change is negative
(A) Micelle formation is an exothermic process
(B) Micelle formation is an endothermic process
(C) The entropy change is positive
(D) The entropy change is negative
1
A and D only
2
A and C only
3
B and C only
4
B and D only
06
PYQ 2023
medium
chemistry ID: jee-main
Match List I and List II
Choose the correct answer from the options given below :
| List II | List II |
|---|---|
| A. Osmosis | I. Solvent molecules pass through semi permeable membrane towards solvent side. |
| B. Reverse osmosis | II. Movement of charged colloidal particles under the influence of applied electric potential towards oppositely charged electrodes. |
| C. Electro osmosis | III. Solvent molecules pass through semi permeable membrane towards solution side. |
| D. Electrophoresis | IV. Dispersion medium moves in an electric field. |
1
A-I, B-III, C-IV, D-II
2
A-III, B-I, C-IV, D-II
3
A-III, B-I, C-II, D-IV
4
A-I, B-III, C-II, D-IV