Question Bank | Chem-11, Ch-02

Here is a vast collection of objective and subjective questions in this question bank of chemistry 11, chapter 02. Following types of questions have been included here.

  • MCQs (Textbook Exercise)
  • MCQs (Previous Boards Essentials)
  • SQs Topic-wise (Previous Boards Essentials + Textbook Conceptuals)
  • LQs (Previous Boards Essentials)

You can find solutions to these questions from our publication, “An Insight Into Objective Chemistry-11”.

MCQs (Textbook Exercise)

Q. Each question has four possible answers. Tick the correct one.

01: A filtration process could be very time consuming if it were not aided by a gentle suction which is developed: (MLT-16)(RWP-22)(BWP-23)

(a) If the paper covers the funnel up to its circumference.

(b) If the paper has got small sized pores in it.

(c) If the stem of the funnel is large so that it dips into the filtrate.

(d) If the paper fits tightly.

02: During the process of crystallization, the hot saturated solution: (GJR-17)(BWP-22)

(a) Is cooled very slowly to get large sized crystals.

(b) Is cooled at a moderate rate to get medium sized crystals.

(c) Is evaporated to get the crystals of the product.

(d) Is mixed with an immiscible liquid to get the pure crystals of the product.

03: Solvent extraction is an equilibrium process and is controlled by: (BWP-16,17,18,19,22,22)(AJK-16)(MLT-16,19,21)(FSL-17)(LHR-17,18,19,21,23)(RWP-17,19,21,22)(DGK-16,17,18,21,23)(SRG-18,19)(SWL-19,21)(GJR-19,21)(GJR-22,22)

(a) Law of mass action

(b) The amount of solvent used

(c) Distribution law     

(d) The amount of solute

04: Solvent extraction method is a partially useful technique for separation when the product to be separated is: (MLT-16)(DGK-16)(LHR-16,22)(AJK-17)(BWP-17)SWL-22)

(a) Non-volatile or thermally unstable

(b) Volatile or thermally stable

(c) Non-volatile or thermally stable

(d) Volatile or thermally unstable

05: The comparative rates at which the solutes move in paper chromatography depend on: (LHR-16,17,22,23)(FSL-16,18,19,19)(GJR-18,21)(RWP-16,17,18)(AJK-16)(SRG-17,18,19)(MLT-19,21)(BWP-19,21)(DGK-22,22)(SWL-23)

(a) The size of paper

(b) Rf values of solutes

(c) Temperature of the experiment

(d) Size of the chromatographic tank used

MCQs (Previous Boards Essentials)

Q. Each question has four possible answers. Tick the correct one.

01: A complete quantitative determination generally consists of how many steps? (RWP-23)  

(a) 4 steps     

(b) 5 steps   

(c) 2 steps     

(d) 6 steps

02: The word ‘porosite’ means: (GJR-16)

(a) Size of pores             

(b) Quality of pores

(c) Number of pores       

(d) Nature of pores

03: The rate of filtration can be increased by using a __________. (DGK-22)

(a) Filter crucible            

(b) Filter paper               

(c) Fluted filter paper      

(d) None of these

04: Gooch crucible is made of: (DGK-17,19)(GJR-23)

(a) Porcelain                   

(b) Silver

(c) Iron                           

(d) Glass

05: The drying agent used in desiccator is: (RWP-22)(SRG-17)(SWL-18,22)(BWP-22)

(a) KMnO4                      

(b) NH4Cl

(c) P2O5                          

(d) Animal charcoal

06: Which is not used as drying agent in a desiccator? (GJR-22)

(a) CaCl2                         

(b) KOH

(c) P2O5                          

(d) Silica gel

07: Coloured impurities appear during crystallization, and are removed by boiling the substance in the solvent with: (FSL-22)

(a) Silica gel                   

(b) Benzoic acid

(c) Animal charcoal        

(d) CaCl2

08: Which of the following substances is used as decoloring agent? (GJR-22)(MLT-23)

(a) Silica gel                   

(b) Animal charcoal

(c) Conc. H2SO4             

(d) Asbestos

09: Direct conversion of solid into its vapours is called: (DGK-21)

(a) Crystallization           

(b) Sublimation

(c) Vapourization           

(d) Distribution

10: The solid which undergoes sublimation: (DGK-23)

(a) NaCl      

(b) KBr        

(c) I2            

(d) KCl

11: Which of the following can be sublimed? (SRG-23)

(a) Calcium                     

(b) NaCl

(c) Naphthalene                  

(d) Na2CO3

12: The compound which undergoes sublimation is: (SWL-17)

(a) KMnO4   

(b) CaCO3    

(c) NH4Cl    

(d) Na2CO3

13: Which one of the following compounds is purified by sublimation? (LHR-19)

(a) Benzoic acid             

(b) SiO2

(c) CS2                                     

(d) NaI

14: The substance which does not show the process of sublimation? (LHR-21)

(a) NH4Cl                       

(b) Iodine

(c) Naphthalene             

(d) Carbon tetrachloride

15: Which one of the following is not purified by sublimation? (AJK-19)

(a) Naphthalene             

(b) Silicon dioxide

(c) I2                                          

(d) Benzoic acid

16: Which one of the following is not purified by sublimation? (LHR-22)

(a) Naphthalene             

(b) NH4Cl

(c) I2                                          

(d) Mercury

17: The most common solvent used in solvent extraction is: (FSL-23)

(a) Acetone                    

(b) Ethanol

(c) Ether                         

(d) Methanol

18: Which of the following solvents is commonly used in solvent extraction technique? (DGK-22)

(a) Methyl Alcohol         

(b) Diethyl Ether

(c) Liquid Ammonia       

(d) Hydrochloric acid

19: Separating funnel is used in: (FSL-22)

(a) Crystallization           

(b) Filtration

(c) Solvent Extraction     

(d) Sublimation

20: The colour of iodine in CCl4 solution: (BWP-23)

(a) Blue       

(b) Brown    

(c) Purple    

(d) Pink

21: The technique in which solute distributes itself in mobile phase and stationary phase: (FSL-22)

(a) Sublimation               

(b) Solvent Extraction

(c) Chromatography       

(d) None of These

22: Chromatography in which the stationary phase is solid is called: (MLT-17)(LHR-22)

(a) Partition chromatography 

(b) Adsorption chromatography

(c) Thin layer chromatography

(d) Paper chromatography

23: The stationary phase in adsorption chromatography is: (FSL-23)

(a) Solid                          

(b) Water

(c) Organic liquid           

(d) Gas

24: The technique of chromatography is useful in organic synthesis: (FSL-22)

(a) Separation                 

(b) Isolation

(c) Purification                

(d) All of these



Q.01: Define analytical chemistry. (SWL-23)

Q.02: Differentiate between qualitative and quantitative analyses. (SWL-17)(BWP-17)(RWP-22)(LHR-23)

Q.03: What are the steps of a complete quantitative analysis? (DGK-19)(SRG-23)


Q.04: Define filtration. (RWP-17)

Q.05: Explain the terms filtrate and residue.

Q.06: How rate of filtration can be increased? (MLT-23)

Q.07: What is fluted filter paper? (RWP-23)

Q.08: How fluted filter paper is prepared? (FSL-22)(GJR-23)

Q.09: What is the advantage of fluted filter paper over normal filter paper? Or How does the rate of filtration increase by fluted filter paper? (LHR-18,19)(SWL-19)(RWP-22)

Q.10: What is Gooch crucible? For what type of crystals, it is used? (FSL-23)

Q.11: What is the purpose of Gooch crucible? (LHR-22)

Q.12: Explain filtration process through Gooch crucible. (RWP-17)(FSL-17)

Q.13: How does a Gooch crucible increase the rate of filtration? (BWP-17)(GJR-23)

Q.14: Concentrated HCl and KMnO4 solutions cannot be filtered through Gooch crucible. Give reason.(LHR-16)(FSL-17)(BWP-23)

Q.15: What is sintered glass crucible? Give its significance. (BWP-23)(GJR-23)

Q.16: What is sintered glass crucible? Why is it preferred overGooch crucible? (FSL-17)

Q.17: Why sintered glass crucible is better than Gooch crucible? (SRG-23)

Q.18: What is the difference between Gooch crucible and sintered glass crucible? (DGK-23)


Q.19: Define crystallization. (RWP-17)

Q.20: Define crystallization. What is the principle of crystallization? (DGK-23)

Q.21: What is the principle of crystallization? (MLT-17,17)

Q.22: Why is there need to crystallize the crude product?(RWP-17)(DGK-17)(SRG-17,19)(SWL-18,23)(MLT-19)(FSL-19)

Q.23: Mention the major steps involved in crystallization. (DGK-16)(LHR-16)(SRG-17)(MLT-17)(GJR-19)

Q.24: Write down the four major steps involved in crystallization. (FSL-22)

Q.25: Give main characteristics of the solvents used for crystallization.(LHR-16,17)(BWP-16,19)(RWP-17)(DGK-17,18)(MLT-17,18,18)(SRG-19)(AJK-19)(GJR-23)

Q.26: Write down the four main characteristics of solvent used in crystallization process. (DGK-22)(SWL-23)

Q.27: Name some solvents which are mostly used in crystallization?(LHR-16)

Q.28: How is saturated solution prepared for crystallization?(SWL-17)(SRG-19)(BWP-22)

Q.29: How moderate cooling is advantageous over slow cooling in crystallization process? (FSL-23)

Q.30: Why is it necessary to filter the saturated solution in hot state?

Q.31: How crystals are collected by Gooch crucible?

Q.32: How crystals are derived by using filter paper? (FSL-19)

Q.33: What is the disadvantage of drying the crystals between the folds of filter paper?(LHR-19)

Q.34: How crystals are dried by filter paper? What is disadvantage of this method? (BWP-19)

Q.35: Write any two methods of drying crystals. (RWP-23)

Q.36: How are crystals dried in an oven?(DGK-17)(LHR-17)(RWP-18)

Q.37: How crystals are dried by a reliable method? (LHR-23)

Q.38: What is safe and reliable method of drying the crystals? (MLT-23)

Q.39: How is a vacuum desiccator used to dry the crystals?  (SRG-17,18)(GJR-16)(FSL-18)(SWL-19)(GJR-22)(DGK-23)

Q.40: How decolourization of crude crystals can takes place? (LHR-22)

Q.41: How is the decolourization of undesirable colours carried out for freshly prepared crystalline substance? OR How coloured are impurities removed from crystals?(DGK-16,17,18,19)(MLT-16,19)(FSL-16,19)(SWL-17)(BWP-18,22,23,23)(RWP-19)(LHR-22)


Q.42: Define sublimation. Give two examples.(RWP-17,19,22)(BWP-17,23)(DGK-18,21,22,23)(GJR-19)(FSL-21,21,22)(SWL-22)

Q.43: Define sublimation. Give the importance of sublimation. (LHR-23)

Q.44: Define sublimation. Write name of two compounds which can be sublimed. (LHR-23)

Q.45: Give examples of subliming solids. (SWL-22)(MLT-21)

Q.46: Describe sublimation process. (BWP-22)

Q.47: How mixture of sand and naphthalene can be purified? (SRG-23)

Q.48: Draw the diagram of sublimation process. (LHR-21)


Q.49: What is solvent extraction?(RWP-18,22)(LHR-17)(BWP-17,19,22)(MLT-18,19)(FSL-21,21,23)(SWL-22,22)(DGK-23)

Q.50: What is solvent extraction? Give its importance. (BWP-23)

Q.51: What is ether extraction? (LHR-19,21)(FSL-23)(GJR-23)

Q.52: State distribution law. Explain with an example. (BWP-16,17,19)(GJR-17,21)(DGK-19,23)(AJK-16,19)(LHR-17,19)(MLT-16,17,18)(FSL-22)

Q.53: Define distribution law. What is distribution co-efficient? (MLT-23)

Q.54: Iodine is more soluble in water in the presence of KI. Give reason. (SWL-23)

Q.55: Why repeated extractions using small quantities of solvent are more efficient than using a single extraction using a large amount of solvent? (DGK-21)(LHR-22,22)


Q.56: Define chromatography. (BWP-17)(SRG-18)(GJR-21)

Q.57: Define: (i) Stationary phase   (ii) Distribution co-efficient.(RWP-21)(SWL-21)

Q.58: Whatis the significance of distribution co-efficient in chromatography? (FSL-23)

Q.59: Writedown the two main phases of chromatography. (RWP-22)

Q.60: What is mobile phase and stationary phase? (GJR-21)(SWL-22)

Q.61: Differentiate between stationary and mobile phase in chromatography. (SRG-18)(LHR-21)(DGK-22)(SWL-23)

Q.62: What are different types of chromatography? OR How chromatography is classified on the basis of stationary phase. (MLT-21)(FSL-22)

Q.63: What do you mean by partition chromatography? (DGK-21)(RWP-22)(GJR-22)(FSL-22)

Q.64: What is partition chromatography and adsorption chromatography? (FSL-23)

Q.65: Differentiate between partition chromatography and adsorption chromatography. (MLT-17,19)(BWP-18)(LHR-17,23)(AJK-16)(RWP-16,18)(FSL-17)(GJR-18,19,19)(SWL-21,23)

Q.66: What is Rf value? Give its units.(MLT-16,17,21)(GJR-17,21,22)(AJK-17)(FSL-18,21)(SRG-19)

Q.67: Define Rf value and why it has no units. (DGK-22)(BWP-22,22)

Q.68: What are three ways for paper chromatography? (MLT-21)

Q.69: Define chromatogram.

Q.70: Give some uses of chromatography. (SRG-17)(SWL-18)(BWP-18)(DGK-19,21)(LHR-21,22)(RWP-21)

Q.71: Write down any two uses of chromatography. (GJR-23)(LHR-23)(RWP-23)

Q.72: Give applications/uses of paper chromatography. (DGK-22,22)


NOTE: No long question is taken from this chapter in board papers.

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