1
JEE Main 2022 (Online) 28th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The Zeta potential is related to which property of colloids?

A
Colour
B
Tyndall effect
C
Charge on the surface of colloidal particles
D
Brownian movement
2
JEE Main 2022 (Online) 28th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Which one of the following techniques is not used to spot components of a mixture separated on thin layer chromatographic plate?

A
I2 (Solid)
B
U.V. Light
C
Visualisation agent as a component of mobile phase
D
Spraying of an appropriate reagent
3
JEE Main 2022 (Online) 27th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

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 :

A
(A) - (II), (B) - (I), (C) - (IV), (D) - (III)
B
(A) - (III), (B) - (I), (C) - (IV), (D) - (II)
C
(A) - (II), (B) - (I), (C) - (III), (D) - (IV)
D
(A) - (III), (B) - (II), (C) - (I), (D) - (IV)
4
JEE Main 2022 (Online) 25th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Incorrect statement for Tyndall effect is :

A
The refractive indices of the dispersed phase and the dispersion medium differ greatly in magnitude.
B
The diameter of the dispersed particles is much smaller than the wavelength of the light used.
C
During projection of movies in the cinemas hall, Tyndall effect is noticed.
D
It is used to distinguish a true solution from a colloidal solution.
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