JEE Main 2021 (Online) 27th August Morning Shift | Surface Chemistry Question 50 | Chemistry | JEE Main - ExamSIDE.com

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1

JEE Main 2021 (Online) 27th August Morning Shift

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

Tyndall effect is more effectively shown by :

A

true solution

B

lyophilic colloid

C

lyophobic colloid

D

suspension

2

JEE Main 2021 (Online) 26th August Evening Shift

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

The sol given below with negatively charged colloidal particles is :

A

FeCl₃ added to hot water

B

KI added to AgNO₃ solution

C

AgNO₃ added to KI solution

D

Al₂O₃.xH₂O in water

3

JEE Main 2021 (Online) 26th August Morning Shift

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

Which one of the following is correct for the adsorption of a gas at a given temperature on a solid surface?

A

$$\Delta$$H > 0, $$\Delta$$S > 0

B

$$\Delta$$H > 0, $$\Delta$$S < 0

C

$$\Delta$$H < 0, $$\Delta$$S < 0

D

$$\Delta$$H < 0, $$\Delta$$S > 0

4

JEE Main 2021 (Online) 25th July Evening Shift

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

Match List I with List II :

List-I Example of colloids	List - II Classification
(a) Cheese	(i) dispersion of liquid in liquid
(b) Pumice stone	(ii) dispersion of liquid in gas
(c) Hair cream	(iii) dispersion of gas in solid
(d) Cloud	(iv) dispersion of liquid in solid

Choose the most appropriate answer from the options given below

A

(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)

B

(a)-(iv), (b)-(i), (c)-(iii), (d)-(ii)

C

(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)

D

(a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)

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