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JEE Main 2022 (Online) 29th June Evening Shift
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A 42.12% (w/v) solution of NaCl causes precipitation of a certain sol in 10 hours. The coagulating value of NaCl for the sol in 2 hours is :

[Given : Molar mass : Na = 23.0 g mol$$-$$1 ; Cl = 35.5 g mol$$-$$1]

A
36 m mol L$$-$$1
B
36 mol L$$-$$1
C
1440 mol L$$-$$1
D
1440 m mol L$$-$$1
2
JEE Main 2022 (Online) 29th June Morning Shift
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Which of the following is a correct statement?

A
Brownian motion destabilises sols.
B
Any amount of dispersed phase can added to emulsion without destablising it.
C
Mixing two oppositely charged sols in equal amount neutralises charges and stabilises colloids.
D
Presence of equal and similar charges on colloidal particles provides stability to the colloidal solution.
3
JEE Main 2022 (Online) 28th June Evening Shift
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Match List - I with List - II :

List-I List-II
(A) negatively charged sol (I) $$F{e_2}{O_3}\,.\,x{H_2}O$$
(B) macromolecular colloid (II) CdS sol
(C) positively charged sol (III) Starch
(D) Cheese (IV) a gel

Choose the correct answer from the options given below:

A
(A) - (II), (B) - (III), (C) - (IV), (D) - (I)
B
(A) - (II), (B) - (I), (C) - (III), (D) - (IV)
C
(A) - (II), (B) - (III), (C) - (I), (D) - (IV)
D
(A) - (I), (B) - (III), (C) - (II), (D) - (IV)
4
JEE Main 2022 (Online) 28th June Morning Shift
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-1
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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
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