JEE Main 2022 (Online) 30th June Morning Shift | Surface Chemistry Question 34 | Chemistry

TLC analysis of a mixture having 3 components (A, B, C) using silica gel as the stationary phase gave following R_f values; for A = 0.72, B = 0.48, C = 0.20.

Regarding the above observations, which one of the following statements is not correct for column chromatography of the mixture?

A is the most non-polar component

C is the most soluble component in mobile phase

A will be eluted first

C is the most strongly absorbed component

JEE Main 2022 (Online) 29th June Evening Shift

MCQ (Single Correct Answer)

-1

Out of Syllabus

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

Out of Syllabus

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

Out of Syllabus

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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