Match List - I with List - II . List- I (Colloid Preparation Method) List- II (Chemical Reaction) ( a ) Hydrolysis ( i ) 2 AuCl 3 + 3 HCHO + 3 H 2 O → 2 Au ( sol ) + 3 HCOOH + 6 HCl ( b ) Reduction ( ii ) As 2 O 3 + 3 H 2 S → As 2 S 3 ( sol ) + 3 H 2 O ( c ) Oxidation ( iii ) SO 2 + 2 H 2 S → 3 S ( sol ) + 2 H 2 O ( d ) Double Decomposition ( iv ) FeCl 3 + 3 H 2 O → Fe ( OH ) 3 ( sol ) + 3 HCl Choose the most appropriate answer from the options given below :

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

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

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

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

Which of the following salt solutions would coagulate the colloid soloution formed when FeCl 3 is added to NaOH solution, at the fastest rate?

10 mL of 0 . 2 mol dm - 3 AlCl 3

10 mL of 0 . 1 mol dm - 3 Na 2 SO 4

10 mL of 0 . 1 mol dm - 3 Ca 3 PO 4 2

10 mL of 0 . 15 mol dm - 3 CaCl 2

MEDIUM

JEE Main

IMPORTANT

Earn 100

The correct option among the following is.

50% studentsanswered this correctly

Important Questions on Surface Chemistry

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 11 - Surface Chemistry>JEE Main - 10th April 2019 Shift 1>Q 58

A gas undergoes physical adsorption on a surface and follows the given Freundlich adsorption isotherm equation

\frac{x}{m} = k p^{0.5}

Adsorption of the gas increases with:

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 11 - Surface Chemistry>JEE Main - 10th April 2016>Q 59

Gold numbers of some colloids are Gelatin:

0.005 - 0.01

, Gum Arabic:

0.15 - 0.25

, Oleate:

0.04 - 1.0

, Starch:

15 - 25

. Which among the following is a better protective colloid?

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 11 - Surface Chemistry>JEE Main - 10th April 2015>Q 60

The following statements relate to the adsorption of gases on a solid surface. Identify the incorrect statement among them:

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 11 - Surface Chemistry>JEE Main - 1 September 2021 Shift 2>Q 61

Match List - $I$ with List - $II .$

List- $I$ (Colloid Preparation Method)		List- $II$ (Chemical Reaction)
$(a)$	Hydrolysis	$(i)$	$2 {AuCl}_{3} + 3 HCHO + 3 H_{2} O \to 2 Au (sol) + 3 HCOOH + 6 HCl$
$(b)$	Reduction	$(ii)$	${As}_{2} O_{3} + 3 H_{2} S \to {As}_{2} S_{3} (sol) + 3 H_{2} O$
$(c)$	Oxidation	$(iii)$	${SO}_{2} + 2 H_{2} S \to 3 S (sol) + 2 H_{2} O$
$(d)$	Double Decomposition	$(iv)$	${FeCl}_{3} + 3 H_{2} O \to Fe (OH)_{3} (sol) + 3 HCl$

Choose the most appropriate answer from the options given below :

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 11 - Surface Chemistry>JEE Main - 24 June 2022 Shift 1>Q 62

Given below are two statements:

Statement I : Emulsions of oil in water are unstable and sometimes they separate into two layers on standing.

Statement II : For stabilisation of an emulsion, excess of electrolyte is added.

In the light of the above statements, choose the most appropriate answer from the options given below :

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 11 - Surface Chemistry>JEE Main - 24 June 2022 Shift 2>Q 63

When

200 mL

0.2 M

acetic acid is shaken with

0.6 g

of wood charcoal, the final concentration of acetic acid after adsorption is

0.1 M

. The mass of acetic acid adsorbed per gram of carbon is

g

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 11 - Surface Chemistry>JEE Main - 25 June 2022 Shift 1>Q 64

Incorrect statement for Tyndall effect is

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 11 - Surface Chemistry>JEE Main - 25 June 2022 Shift 1>Q 65

Using very little soap while washing clothes, does not serve the purpose of cleaning of clothes, because

The correct option among the following is.

Important Questions on Surface Chemistry

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