12th Chemistry chapter 5 Bihar board with NCERT-Details & Highlights
| name of content | 12th Chemistry chapter 5 full solution |
| content | Chemistry objective type MCQ question with answer |
| name of subjects | class 12 Chemistry |
| important for exam | Bihar board & other state board |
| pattern & Level | NCERT & State level question |
12th Chemistry chapter 5 all objective solutions – download PDF
1. Which of the following is less than zero during adsorption ?
-
- (a) ΔG
- (b) ΔS
- (c) ΔH
- (d) All of these
Ans (D)
2. Which of the following is a property of physisorption ?
-
- (a) High specificity
- (b) Irreversibility
- (c) Non-specificity
- (d) None of these
Ans (C)
3. Which of the following statement is not correct about physisorption ?
-
- (a) It is a reversible process
- (b) It requires less heat of adsorption
- (c) It requires activation energy
- (d) It takes place at low temperature
Ans (C)
4. The incorrect statement about physical adsorption is
-
- (a) it lacks specificity
- (b) it is generally reversible
- (c) porous surfaces are good adsorbent
- (d) heat of adsorption is quite high
Ans (D)
5. Which is correct in case of van der Waals adsorptions ?
-
- (a) High temperature, low pressure
- (b) High temperature, high pressure
- (c) Low temperature, low pressure
- (d) Low temperature, high pressure
Ans (D)
6. Which, of the following gases is least absorbed on charcoal ?
-
- (a)HCl
- (b) NH3
- (c) O2
- (d) CO2
Ans (C)
7. Which of the following is not characteristic of chemisorption ?
-
- (a) Adsorption is specific
- (b) Heat of adsorption is of the order of 200 kJ mol-1
- (c) Adsorption is irreversible
- (d) Adsorption may be multimolecular layers
Ans (D)
8. Which of the following is not correct regarding the adsorption of a gas on the surface of solid ?
-
- (a) On increasing pressure, adsorption keeps on increasing
- (b) Enthalpy and entropy changes are negative
- (c) Chemisorption is more specific than physisorption
- (d) It is a reversible reaction
Ans (A)
9. At low pressure, the fraction of the surface covered follows
-
- (a) zero-order kinetics
- (b) first order kinetics
- (c) second order kinetics
- (d) fractional order kinetics
Ans (B)
10. Which of the following gases present in a polluted area will be adsorbed most easily on the charcoal gas mask ?
-
- (a) H2
- (b) O3
- (c) N2
- (d) SO2
Ans (D)
12th chemistry chapter 5 most mcq solution
11. Which of the following is application of adsorption in chemical analysis
-
- (a) Adsorption indicators
- (b) Thin layer chromatography
- (c) Qualitative analysis
- (d) All of these
Ans (D)
12. What is the role of adsorption in froth floatation process used especially for concentration of sulphide ores ?
-
- (a) Shape selective catalysts
- (b) Adsorption of pine oil on sulphide ore particles
- (c) Adsorption of pine oil on impurities
- (d) Production of heat in the process of exothermic reaction
Ans (B)
13. Which of the following can adsorb larger volume of hydrogen gas ?
-
- (a) Finely divided platinum
- (b) Colloidal solution of palladium
- (c) Small pieces of palladium
- (d) A single metal surface of platinum
Ans (B)
14. Which kind of catalysis can be explained on the basis of adsorption theory ?
-
- (a) Homogeneous catalysis
- (b) Heterogeneous catalysis
- (c) Negative catalysis
- (d) Auto catalysis
Ans (B)
15. The oxide of nitrogen which acts as a catalyst in lead chamber proces is …………
-
- (a) NO
- (b) NO2
- (c) N2O4
- (d) N2O5
Ans (A)
16. Shape-selective catalysis is a reaction catalysed by …………….
-
- (a) zeolites
- (b) enzymes
- (c) platinum
- (d) Ziegler-Natta catalyst
Ans (A)
17. The activity of an enzyme becomes ineffective ……….
-
- (a) at low temperature
- (b) at atmospheric pressure
- (c) at high temperature
- (d) in aqueous medium
Ans (C)
18. The size of colloidal particles ranges between ………….
-
- (a) 10-7 – 10-9cm
- (b) 10-9 -101 cm
- (c) 10-5 – 10-7cm
- (d) 10-2 – 10-3cm
Ans (C)
19. Which of the following will not form a colloidal system ?
-
- (a) Solid-gas
- (b) Liquid-gas
- (c) Gas-gas
- (d) Gas-liquid
Ans (C)
20. Fog is an example of colloidal system of ………….
-
- (a) liquid in gas
- (b) gas in liquid
- (c) solid in gas
- (d) gas in solid
Ans (A)
Bihar Board objective solution 12th chemistry chapter 5
21. A colloidal system in which liquid is dispersed phase and solid is dispersion medium is classified as ………….
-
- (a) gel
- (b) sol
- (c) emulsion
- (d) aerosol
Ans (A)
22. Which of the following example is correctly matched ?
-
- (a) Butter – gel
- (b) Smoke – emulsion
- (c) Paint – foam
- (d) Milk – aerosol
Ans (A)
23. Which of the following factors contribute towards higher stability of lyophilic colloid ?
-
- (a) Charge on their particles
- (b) Attractive forces between particles
- (c) Small size of their particles
- (d) High solvation due to a layer of dispersion medium
Ans (D)
24. A lyophobic colloid cannot be formed by ………….
-
- (a) mixing dispersed phase and dispersion medium
- (b) chemical reactions like hydrolysis
- (c) exchange of solvent
- (d) geptisation
Ans (A)
25. Which of the following is not correctly matched ?
-
- (a) Gelatin – Lyophilic colloid
- (b) Gold sol – Lyophilic colloid
- (c) Arsenious sulphide – Lyophobic colloid
- (d) Ferric hydroxide – Lyophobic colloid
Ans (B)
26. The substances which behave as colloidal solutions at higher concentration are called ………….
-
- (a) associated colloids
- (b) multimolecular colloids
- (c) macromolecular colloids
- (d) protective colloids
Ans (A)
27. The formation of micelles takes place only above …………..
-
- (a) critical temperature
- (b) Kraft temperature
- (c) inversion temperature
- (d) absolute temperature
Ans (B)
28. The critical micelle concentration (CMC) is defined as…………….
-
- (a) the concentration at which micellization starts
- (b) the concentration at which micelle starts behaving like an electrolyte
- (c) the concentration at which dispersed phase is separated from dispersion medium
- (d) the concentration at which a colloid is converted to suspension
Ans (A)
29. Soap mixed with water below critical micelle concentration behaves as
-
- (a) associated colloid
- (b) macromolecular colloid
- (c) normal electrolytic solution
- (d) multimolecular colloid
Ans (C)
30. White of an egg whipped with water acts as …………………
-
- (a) macromolecular colloid
- (b) associated colloid
- (c) molecular colloid
- (d) normal electrolytic solution
Ans (A)
BSEB 12th chemistry chapter 5 most mcq notes solution
31. Which of the following is not a method of removing impurities from a colloidal sol ?
-
- (a) Electrodialysis
- (b) Ultrafiltration
- (c) Ultra centrifugation
- (d) Distillation
Ans (D)
32. Tyndall effect is not observed in ………………
-
- (a) smoke
- (b) emulsions
- (c) sugar solution
- (d) gold sol
Ans (C)
33. Which of the following systems will show Tyndall effect ?
-
- (a) Aqueous solution of sodium chloride
- (b) Aqueous solution of aluminium hydroxide
- (c) Aqueous solution of glucose
- (d) Aqueous solution of urea
Ans (B)
34. Which of the following is not an explanation for the origin of charge on the colloidal particles ?
-
- (a) Due to frictional electrification
- (b) Due to dissociation of surface molecules
- (c) Due to electrophoresis
- (d) Due to selective adsorption of ions
Ans (C)
35. Movement of dispersion medium under the influence of electric field is known as ……………
-
- (a) electrodialysis
- (b) electrophoresis
- (c) electroosmosis
- (d) cataphoresis
Ans (C)
36. Why is alum added to water containing suspended impurities ?
-
- (a) To make a colloidal solution
- (b) To coagulate the suspended impurities
- (c) To remove impurities of calcium and magnesium
- (d) To protect the colloidal solution from getting precipitated
Ans (B)
37. Which of the following acts as the best coagulating agent for ferric hydroxide sol ?
-
- (a) Potassium ferrocyanide
- (b) Potassium chloride
- (c) Potassium oxalate
- (d) Aluminium chloride
Ans (A)
38. Why is gelatin mixed with gold sol ?
-
- (a) Gold sol is lyophobic sol, gelatin acts as stabilising agent
- (b) Gold sol is lyophilic sol, gelatin acts as stabilising agent
- (c) Gelatin produces negative charge on gold particles in gold sol
- (d) Gelatin helps gold sol to get its critical micelle concentration
Ans (A)
39. Which of the following is not a method for coagulation of lyophobic sols ?
-
- (a) By electrophoresis
- (b) By mixing oppositely charged sols
- (c) By adding electrolyte
- (d) By adding a protective colloid
Ans (D)
40. What happens when a lyophilic sol is added to a lyophobic sol ?
-
- (a) Lyophilic sol is protected
- (b) Lyophobic sol is protected
- (c) Both the sols are coagulated
- (d) Electrophorsis takes place
Ans (B)
Important most mcq solution 12th chemistry chapter 5
41. Which of the following is not an example of an emulsifying agent ?
-
- (a) Proteins
- (b)Gums
- (c) Soaps
- (d) Electrolytes
Ans (D)
42. The separation of an emulsion into its constituent liquids is known as
-
- (a) emulsification
- (b) protection of colloid
- (c) coagulation
- (d) demulsification
Ans (D)
43. Which of the following processes does not occur at the interface of phases ?
-
- (a) Crystallisation
- (b) Heterogeneous catalysis
- (c) Homogeneous catalysis
- (d) Corrosion
Ans (C)
44. At the equilibrium position in the process of adsorption …………
-
- (a) ΔH > 0
- (b) ΔH = TΔS
- (c) ΔH>TΔS
- (d) ΔH<TΔS
Ans (B)
45. Which of the following interfaces cannot be obtained ?
-
- (a) Liquid-Liquid
- (b) Solid-Liquid
- (c) Liquid-Gas
- (d) Gas-Gas
Ans (D)
46. The term ‘sorption’ stands for………………
-
- (a) absorption
- (b) adsorption
- (c) both absorption and adsorption
- (d) desorption
Ans (C)
47. Which of the following is not a favourable condition for physical adsorption ?
-
- (a) High pressure
- (b) Negative ΔH
- (c) Higher critical temperature of adsorbate
- (d) High temperature
Ans (D)
48. Physical adsorption of a gaseous species may change to chemical adsorption with……………
-
- (a) decrease in temperature
- (b) increase in temperature
- (c) increase in surface area of adsorbent
- (d) decrease in surface area of adsorbent
Ans (B)
49. Which of the following is an example of absorption ?
-
- (a) Water on silica gel
- (b) Water on calcium chloride
- (c) Hydrogen on finely divided nickel
- (d) Oxygen on metal surface
Ans (B)
50. At high concentration of soap in water, soap behaves as ……..
-
- (a) molecular colloid
- (b) associated colloid
- (c) macromolecular colloid
- (d) lyophilic colloid
Ans (B)
51. Freshly preparad precipitate sometimes gets converted to colloidal solution by …………..
-
- (a) coagulation
- (b) electrolysis
- (c) diffusion
- (d) peptisation
Ans (D)
52. Which of the following process is responsible for the formation of delta at a place where rivers meet the sea ?
-
- (a) Emulsification
- (b) Colloid formation
- (c) Coagulation
- (d) Peptisation
Ans (C)
53. Which of the following process is not responsible for the presence of electric charge on the sol particles ?
-
- (a) Electron capture by sol particles
- (b) Adsorption of ionic species from solution
- (c) Formation of Helmholtz electrical double layer
- (d) Adsorption of ionic species from solution
Ans (D)
| Next Subject | Next Chapter |
Bihar board 12th Chemistry chapter 5 complete objective
12th Chemistry objective: we have covered all mcq type objective question of 12th Chemistry chapter 5 on this post, and I hope it will be helpful your board exam. now its time to share it with your friends, and also suggest me what you need.
chapter 5 Chemistry objective question
12th Chemistry chapter 5, class 12 Chemistry chapter 5 objective questions in hindi, class 12 Chemistry chapter 5 mcq questions pdf download, Chemistry mcq for class 12 with answers chapter 5 electric charges and fields, 12th class Chemistry chapter 5 objective, class 12 Chemistry chapter 5, Bihar board Chemistry chapter 5 class 12.
Chemistry multiple choice questions with answers for class 12 pdf, mcq questions for class 12 Chemistry chapter wise pdf, Chemistry objective questions for 12th pdf, Chemistry objective questions for 12th pdf in hindi, Chemistry objective questions for 12th bihar board pdf,
Bihar board 12th science stream subjects wise solution
click here to check out Bihar board science stream all subjects solutions
| SL.N. | Subject name with solutions |
| 01 | Physics |
| 02 | Chemistry |
| 03 | Biology |
| 04 | Math |
| 05 | Hindi |
| 06 | English |
