Class 12 Chemistry Chapter 5 Surface Chemistry MCQs | Class 12 Chemistry Chapter 5 Surface Chemistry Short Questions and Answers

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Questions
Which of the following is reversible sol ?
A Cellulose
B Mist
C Gelatin
D none

Answer:Gelatin
2 Which type of sol sulphar is ?
A Multimolecular colloid
B Micelle
C Associated colloid
D Macromolecular colloid

Answer:Multimolecular colloid
3 Which of the following is macromolecalar colloid ?
A Artificial rubber
B Protein
C Nylon
D All the given

Answer: All the given
4 What is called to that temperature at which the formation of micelle takes place ?
A Zero temperature
B Kraff temperatue
C Kelvin temperature
D Absolute temperature

Answer:Kraff temperatue
5 At which condition micelle is formed ?
A At concentration higher then critical micelle concentration and lower then kraft temperature
B At concentration higher then critical micelle concentration and higher then kraft temperature
C At concentration lower then critical micelle concentration and lower then kraft temperature
D At concentration lower then critical micelle concentration and higher then kraft temperature

Answer: At concentration higher then critical micelle concentration and higher then kraft temperature
6 In which of the following method condensation and dispersion are associated ?
A Excessive cooling
B Hydrolysis
C Bredig’s are
D Peptization

Answer: Bredig’s are
7 Which method is is used to obtain sol of gold and silver ?
A Electric dispersion
B Peptization
C Excessive cooling
D Mechanical dispersion

Answer: Electric dispersion
8 Whose menbranes are used in dialysis ?
A Parchment paper
B Plastic
C Filter paper
D Ultrafilter paper

Answer:Parchment paper
9 ___Phenomenon is called reverse to coagulation ?
A Flocculation
B Tyndall
C Brownian
D Dialysis

Answer: Flocculation
10 By the use of which colligative property molecularmass of colloid can be determine ?
A Decrease in vapour pressure
B Elevation in boiling point
C Depression infeezing point
D Osmotic pressure

Answer: Osmotic pressure
11 Which of the following is oil/water emulsion ?
A Milk
B Vanishing cream
C Butter
D All the given

Answer: Milk
12 Which of the following substance is used as stabilizer in emulsion ?
A Protein
B Gum
C Agar
D All the given

Answer:All the given
13 Tyndall effect is associated with which property of colloid ?
A Mechanical
B Colligative
C Optical
D Electrical

Answer: Optical
14 Which method is used for demulsification ?
A Sulimation
B DIstillation
C Filtration
D Centrifugation

Answer:Centrifugation
15 Surface-tention of lyophobic sol is
A less then water
B greater then water
C equal to water
D can not be predict

Answer:less then water
16 For the preparation of which substances reversible micelle is used ?
A Medicines
B Nano products
C Rubber plating
D All the given

Answer:Nano products
17 Tyndall effect is shown by
A Ideal solution
B Colloidal solution
C Saturated solution
D True solution

Answer:Saturated solution
18 Which of the following can prepare cationic micelle ?
A Sodium stearate
B Cetyltrimethyl ammonium bromide
C Urea
D Sodium dodesylsulphate

Answer:Urea
19 When the rate of physical adsorption will increase ?
A By reducing pressure
B By reducing temperature
C By increasing temperature
D (a) and (c)

Answer: By reducing pressure
20 According to the adsorption theory of catalysis, the speed of the reaction increases because
A Adsorption produces heat which increases the speed of the reaction
B Adsorption lowers the activation energy of the raction
C The concentration of reactant molecules at the active centres of the catalyst becomes high due to adsorption
D In the process of adsorption, the activation energy of the molecules become large

Answer:Adsorption lowers the activation energy of the raction

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