CUET-UG SERIES Chemistry
Colloids
9 previous year questions.
Volume: 9 Ques
Yield: Medium
High-Yield Trend
1
2025 1
2024 7
2023 Chapter Questions 9 MCQs
01
PYQ 2023
medium
chemistry ID: cuet-ug-
Arrange the following according to their coagulating power towards a positively charged colloid:
(A) [Fe(CN)6]4-
(B) PO43-
(C) Cl-
(D) S2-
(E) NH3
Choose the correct answer from the options given below :
(A) [Fe(CN)6]4-
(B) PO43-
(C) Cl-
(D) S2-
(E) NH3
Choose the correct answer from the options given below :
1
(E) < (C) < (D) < (B) < (A)
2
(E) < (C) < (D) < (A) < (B)
3
(E) < (C) < (A) < (B) < (D)
4
(E) < (C) < (B) < (D) < (A)
02
PYQ 2023
medium
chemistry ID: cuet-ug-
Which of the following sols are correctly matched with their corresponding charges?
(A) Cr(OH)3 sol: negatively changes sol
(B) TiO2 sol: positively charges sol
(C) CdS sol : positively charged sol
(D) Gum : negatively sol
(E) Silver sol : positively charged sol
Choose the correct answer from the option given below
(A) Cr(OH)3 sol: negatively changes sol
(B) TiO2 sol: positively charges sol
(C) CdS sol : positively charged sol
(D) Gum : negatively sol
(E) Silver sol : positively charged sol
Choose the correct answer from the option given below
1
(C) and (E) only
2
(A) and (C) only
3
(B) and (E) only
4
(B) and (D) only
03
PYQ 2023
medium
chemistry ID: cuet-ug-
Coagulating power of an ion for a colloid solution depends on
1
Its magnitude of charge only
2
Its size only
3
Its tendency to hydrate
4
Its size and magnitude of charge both
04
PYQ 2023
medium
chemistry ID: cuet-ug-
Which of the following electrolytes will have maximum coagulating value for AgI/Ag sol?
1
Na S
2
Na PO
3
Na SO
4
NaCl
05
PYQ 2023
medium
chemistry ID: cuet-ug-
During peptization the
precipitate breaks up into smaller particles of the size of a colloid
molecules aggregate together to form a colloid
the precipitate adsorb one of the ions of the electrolyte on its surface
precipitate is shaken with the dispersion medium
molecules loses positive and negative charge.
Choose the correct answer from the options given below:
precipitate breaks up into smaller particles of the size of a colloid
molecules aggregate together to form a colloid
the precipitate adsorb one of the ions of the electrolyte on its surface
precipitate is shaken with the dispersion medium
molecules loses positive and negative charge.
Choose the correct answer from the options given below:
1
A, B and C only
2
B, C and D only
3
C, D and E only
4
A, C and D only
06
PYQ 2023
medium
chemistry ID: cuet-ug-
Which of the following statements are true?
A. Flocculation value is inversely proportional to the coagulating power.
B. Colloidal silicon is a protective colloid.
C. Alum is used for cleaning muddy water.
D. Gelatin is added to ice cream to act as an emulsifier.
Choose the most appropriate answer from the options given below.
A. Flocculation value is inversely proportional to the coagulating power.
B. Colloidal silicon is a protective colloid.
C. Alum is used for cleaning muddy water.
D. Gelatin is added to ice cream to act as an emulsifier.
Choose the most appropriate answer from the options given below.
1
A, C, D only
2
A, B, C only
3
B, C, D only
4
A, B, C, D only
07
PYQ 2023
medium
chemistry ID: cuet-ug-
The minimum concentration of an electrolyte in millimoles per litre which is required to cause the precipitation of a sol in two hours is called as:
1
Coagulating value
2
Gold number
3
Congorobin number
4
Flocculation
08
PYQ 2024
easy
chemistry ID: cuet-ug-
The gold number range of some lyophilic colloids is given below: A: 0.005–0.01, B: 0.15–0.25, C: 0.04–1.0, D: 15–25
1
A
2
B
3
C
4
D
09
PYQ 2025
medium
chemistry ID: cuet-ug-
The gold number range of some of the lyophilic colloids is given below:
A: 0.005 - 0.01, B: 0.15 - 0.25, C: 0.04 - 1.0, D: 15 - 25.
1
A
2
B
3
C
4
D