JEE Main 2022 (Online) 25th July Evening Shift | Surface Chemistry Question 35 | Chemistry

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JEE Main 2022 (Online) 25th July Evening Shift

MCQ (Single Correct Answer)

-1

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 and D only

A and C only

B and C only

B and D only

JEE Main 2022 (Online) 29th June Evening Shift

MCQ (Single Correct Answer)

-1

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]

36 m mol L^$$-$$1

36 mol L^$$-$$1

1440 mol L^$$-$$1

1440 m mol L^$$-$$1

JEE Main 2022 (Online) 29th June Morning Shift

MCQ (Single Correct Answer)

-1

Which of the following is a correct statement?

Brownian motion destabilises sols.

Any amount of dispersed phase can added to emulsion without destablising it.

Mixing two oppositely charged sols in equal amount neutralises charges and stabilises colloids.

Presence of equal and similar charges on colloidal particles provides stability to the colloidal solution.

JEE Main 2022 (Online) 28th June Evening Shift

MCQ (Single Correct Answer)

-1

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) - (II), (B) - (III), (C) - (IV), (D) - (I)

(A) - (II), (B) - (I), (C) - (III), (D) - (IV)

(A) - (II), (B) - (III), (C) - (I), (D) - (IV)

(A) - (I), (B) - (III), (C) - (II), (D) - (IV)

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