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R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - NEET MCQ


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30 Questions MCQ Test Chemistry Class 12 - R.C. Mukherjee Test: Surface Chemistry (Old NCERT)

R.C. Mukherjee Test: Surface Chemistry (Old NCERT) for NEET 2024 is part of Chemistry Class 12 preparation. The R.C. Mukherjee Test: Surface Chemistry (Old NCERT) questions and answers have been prepared according to the NEET exam syllabus.The R.C. Mukherjee Test: Surface Chemistry (Old NCERT) MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for R.C. Mukherjee Test: Surface Chemistry (Old NCERT) below.
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R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 1

Which gas will be adsorbed on a solid to greater extent.

Detailed Solution for R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 1

A gas with high critical temperature has high vander waal force due to which they are more easily liquefiable & hence more easily adsorb as adsorption decreases  their energy

R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 2

Which of the following factors affects the adsorption of a gas on solid ?

Detailed Solution for R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 2

Extent of adsorption increase with increase in critical temperature

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R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 3

The volume of gases NH3, CO2 and CH4 adsorbed by one gram of charcoal at 298 K are in

Detailed Solution for R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 3

Extent of adsorption & intermoleculer force ∞ vander waal const. (a) NH3 > CO2 > CH4

R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 4

The heat of physisorption lie in the range of

Detailed Solution for R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 4

Refer theory

R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 5

Which of the following is not a gel ?

Detailed Solution for R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 5

Milk is emulsion

R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 6

Which of the following is used to adsorb water

Detailed Solution for R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 6

H2O + SiO2 → SiO2. xH2O
Sillica gel

R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 7

An emulsion is colloidal system of

Detailed Solution for R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 7

Emulsion :- (ℓ + ℓ) dispersed phase & dispersion medium both are liquid

R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 8

Which of the following is a lyophobic colloid ?

Detailed Solution for R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 8

Gelation, starch & gum are organic in nature & hence lyophilic in nature but S8 is inorganic in nature & hence lyophobic in nature

R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 9

The nature of bonding forces in adsorption

Detailed Solution for R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 9

Vander waal force is responsible for adsorption.

R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 10

The Tyndall effect associated with colloidal particles is due to

Detailed Solution for R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 10

Tyndall effect is due to scattering of light

R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 11

Which one of the following is not applicable to chemisorption ?

Detailed Solution for R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 11

Chemisorption is irreversible in nature because in chemisorption there are strong covalent bond are formed which do not brake easily to separate the reactants because of this it has high heat of adsorption, takes place at high temperatures and forms monolayers.

R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 12

In the colloidal state the particle size ranges

Detailed Solution for R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 12

Colloidal range of particle is 1nm-1000 nm

R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 13

All colloids

Detailed Solution for R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 13

colloids are heterogeneous in nature & hence consist of two phase.

R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 14

Colloids can be purified by

Detailed Solution for R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 14

Refer theory

R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 15

Milk is an example of

Detailed Solution for R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 15

Milk is emulsion (butter fat dispersed in water).

R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 16

Colloidal particles in a sol. can be coagulated by

Detailed Solution for R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 16

The correct answer is option  D

Stability of the lyophobic sols is due to presence of charge on colloidal particles. If charge is removed, particles come together and settle down. Spontaneous destabilization of solution is ageing and destabilization of solution by artificial means is called coagulation.
Methods of coagulation are as follows:
1. Boiling
2. Dialysis
3. Addition of electrolytes
4. Mixing two oppositely charged sols
5. Electrophoresis

R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 17

Fog is a colloidal system of

Detailed Solution for R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 17

Fog (liquid + gas) dispersed phase Dispersion medium.

R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 18

Given below are a few electrolytes, indicates which one among them will bring about the coagulation of a gold sol. quickest and in the least of concentration ?

Detailed Solution for R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 18

As per Hardy shulze rule coagulation power a +ve charge which is maximum in Al3+.

R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 19

When a colloidal solution is observed under ultramicroscope, we can see

Detailed Solution for R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 19

Ultra–microscope is based on tyndall effect which is based on scattering of light.

R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 20

Colloidal solution are classified on the basis of

Detailed Solution for R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 20

Molecular size for colloidal range in 1nm–1000 nm.

R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 21

The minimum concentration of an electrolyte required to cause coagulation of a sol. is called

Detailed Solution for R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 21

Refer theory

R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 22

The electrical charge on a colloidal particle is indicated by

Detailed Solution for R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 22

Due to charge on colloidal particle they move under the influence of electric field.

R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 23

Smoke precipitator works on the principle of

Detailed Solution for R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 23

Neutralization of charge on colloid as per hardy shulze rule.

R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 24

Which one of following statement is not correct in respect of lyophilic sols ?

Detailed Solution for R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 24

Lyophilic colloids do not move in presence of electric field due to uncharged nature.

R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 25

As2S3 sol is

Detailed Solution for R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 25

As2S3 colloid can be represented as As2S3 s2–
so it is negatively charged.

R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 26

Crystalloids differ from colloids mainly in respect of

Detailed Solution for R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 26

Crystalloid & colloids differes in particle size & due to smaller size of crystalloid.

R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 27

At the critical micelle concentration (CMC) the surfacent molecules

Detailed Solution for R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 27

Micelle is a associated form of colloid

R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 28

Alums purify muddy water by

Detailed Solution for R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 28

Alums due to the charged nature of colloidal particle & hence coagular impurities in muddy water as per shulze rule.

R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 29

Solute dispersed in ethanol is called

Detailed Solution for R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 29

Ethanol is alcohol to the colloidal system is called alcosols.

R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 30

Which one of the following is lyophilic colloid ?

Detailed Solution for R.C. Mukherjee Test: Surface Chemistry (Old NCERT) - Question 30

Colloidal sols formed by mixing substances in a suitable dispersion medium are called lyophilic sols. These are quite stable. They are also known as reversible sols because the dispersion medium can be separated from the colloid by means of physical methods like evaporation. For e.g. gum, gelatin, starch, rubber etc.

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