MCQOPTIONS
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MCQOPTIONS
This section includes 39 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry Mcqs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following technique is used for the separation of insoluble particles from liquids? |
| A. | Filtration |
| B. | Crystallization |
| C. | Solvent extraction |
| D. | Chromatography |
| Answer» B. Crystallization | |
| 2. |
Which of the following way in used for classification of chromatography? |
| A. | Shape |
| B. | Phase |
| C. | Mechanism |
| D. | All |
| Answer» E. | |
| 3. |
Fluted filter paper is used to |
| A. | Filter hot solution |
| B. | Avoid premature crystallization |
| C. | Increase the rate of filtration |
| D. | Decrease the area |
| Answer» D. Decrease the area | |
| 4. |
Safe and the most reliable method of drying crystals is through |
| A. | Filter paper |
| B. | Vacuum desiccators |
| C. | Oven |
| D. | None of these |
| Answer» C. Oven | |
| 5. |
A substance having very high vapour pressure at its melting point on heating will show |
| A. | Melting |
| B. | Sublimation |
| C. | Decomposition |
| D. | Condensation |
| Answer» C. Decomposition | |
| 6. |
A process controlled by Distributive law is |
| A. | Crystallization |
| B. | Sublimation |
| C. | Solvent extraction |
| D. | Filtration |
| Answer» D. Filtration | |
| 7. |
A technique of partition chromatography in which the solvent is in a pool at the bottom of container |
| A. | Adsorption chromatography |
| B. | Ascending chromatography |
| C. | Radial chromatography |
| D. | Descending chromatography |
| Answer» C. Radial chromatography | |
| 8. |
Repeated extraction using small portions of solvents is more |
| A. | Reliable |
| B. | Efficient |
| C. | Rapid |
| D. | Slow |
| Answer» C. Rapid | |
| 9. |
Silica gel and alumina are used as |
| A. | Mobile phase |
| B. | Stationary phase |
| C. | Mixed phase |
| D. | Single phase |
| Answer» C. Mixed phase | |
| 10. |
Shaking two immiscible liquids increases |
| A. | Length of contact |
| B. | Volume of contact |
| C. | Area of contact |
| D. | All of above |
| Answer» D. All of above | |
| 11. |
The solvent or mixture of solvents used for separation of compounds is called |
| A. | Stationary phase |
| B. | Mobile phase |
| C. | Dynamic phase |
| D. | Static phase |
| Answer» C. Dynamic phase | |
| 12. |
Which is not a sublime material |
| A. | Iodine |
| B. | Benzoic acid |
| C. | Ammonium chloride |
| D. | Potash alum |
| Answer» E. | |
| 13. |
Sintered glass is a porous material used for |
| A. | Absorption |
| B. | Adsorption |
| C. | Filtration |
| D. | Sublimation |
| Answer» D. Sublimation | |
| 14. |
Selection of filter paper depends on size of particles to be |
| A. | Filtered |
| B. | Dried |
| C. | Decolorized |
| D. | Decanted |
| Answer» B. Dried | |
| 15. |
The solution remaining after the formation of crystals is called |
| A. | Mother liquor |
| B. | Dilute solution |
| C. | Residue |
| D. | Both a & b |
| Answer» B. Dilute solution | |
| 16. |
Which is not related pair of term used in analytical techniques |
| A. | Filtrate residue |
| B. | Sublimate sublimation |
| C. | Drying desiccator |
| D. | Separating funnel mother liquor |
| Answer» C. Drying desiccator | |
| 17. |
The major steps involved in complete quantitative analysis are |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» D. 5 | |
| 18. |
Rate of filtration can be increased by applying gentle suction |
| A. | Gooch crucible |
| B. | Filter paper |
| C. | Sintered crucible |
| D. | All of the above |
| Answer» C. Sintered crucible | |
| 19. |
Separation of a solid from its hot saturated solution by cooling is called |
| A. | Vapourization |
| B. | Solvent extraction |
| C. | Filtration |
| D. | Crystallization |
| Answer» E. | |
| 20. |
Sintered crucible is made up of |
| A. | Plastic |
| B. | Glass |
| C. | Porcetain |
| D. | Fiber |
| Answer» C. Porcetain | |
| 21. |
The tip of funnel should touch the wall of the breaker in order to avoid |
| A. | Inconsistent flow of filtration |
| B. | Splashing |
| C. | Premature crystallization |
| D. | All of above |
| Answer» C. Premature crystallization | |
| 22. |
In crystallization if the solvent is inflammable then direct heating is |
| A. | Needed |
| B. | Avoided |
| C. | Depends on temperature |
| D. | Crystallization does not involve heating |
| Answer» C. Depends on temperature | |
| 23. |
Which of the following technique is simple and efficient to purify a substance |
| A. | Filtration |
| B. | Sublimation |
| C. | Crystallization |
| D. | Solvent extraction |
| Answer» E. | |
| 24. |
In solvent extraction ether is used to separate products of organic synthesis from |
| A. | Water |
| B. | Iodine |
| C. | Hydrochloric acid |
| D. | Gases |
| Answer» B. Iodine | |
| 25. |
The use of CaCl2 and PCl5 in the process of crystallization is as a |
| A. | Oxidizing agent |
| B. | Reducing agent |
| C. | Drying agent |
| D. | Colouring agent |
| Answer» D. Colouring agent | |
| 26. |
Ratio of the amount of solute in organic and aqueous solvent is |
| A. | Retardation factor |
| B. | Distribution co-efficient |
| C. | Distribution in aqueous solution |
| D. | All statements are wrong |
| Answer» C. Distribution in aqueous solution | |
| 27. |
Without suction pump filtration is |
| A. | Fast process |
| B. | Slow process |
| C. | Rapid process |
| D. | All are possible |
| Answer» C. Rapid process | |
| 28. |
Animal charcoal adsorbs the coloured |
| A. | Impurities |
| B. | Crystals |
| C. | Solvents |
| D. | Both a & b |
| Answer» B. Crystals | |
| 29. |
Direct conversion of solids into vapours is called |
| A. | Solvent extraction |
| B. | Sublimation |
| C. | Crystallization |
| D. | Vaporization |
| Answer» C. Crystallization | |
| 30. |
Crystallization does not involve |
| A. | Heating |
| B. | Sublimation |
| C. | Cooling |
| D. | Vaporization |
| Answer» C. Cooling | |
| 31. |
In CCI4 I2 shows |
| A. | Red colour |
| B. | Purple colour |
| C. | Blue colour |
| D. | Yellow colour |
| Answer» C. Blue colour | |
| 32. |
Different components of a mixture have different Rf values due to |
| A. | Polar solvent used |
| B. | Combination of solvents used |
| C. | Their different distribution coefficients in the solvent |
| D. | Distributive law |
| Answer» D. Distributive law | |
| 33. |
Branch of chemistry that deals with the complete qualitative and quantitative analysis of a substance is |
| A. | Stoichio chemistry |
| B. | Physical chemistry |
| C. | Analytical chemistry |
| D. | Quantum chemistry |
| Answer» D. Quantum chemistry | |
| 34. |
Identification of the components of a sample is |
| A. | Quantitative analysis |
| B. | Qualitative analysis |
| C. | Stoichiometry |
| D. | Physical chemistry |
| Answer» C. Stoichiometry | |
| 35. |
Estimation of amounts of different components in a sample is |
| A. | Quantitative analysis |
| B. | Qualitative analysis |
| C. | Stochiometery |
| D. | Physical chemistry |
| Answer» B. Qualitative analysis | |
| 36. |
The technique used to separate components of mixture in solid phase. |
| A. | Crystallization |
| B. | Filtration |
| C. | Sublimation |
| D. | Solvent extraction |
| Answer» D. Solvent extraction | |
| 37. |
The solid which is left over the filter paper as a result of filtration |
| A. | Insoluble particles |
| B. | Residue |
| C. | Crystals |
| D. | Mud |
| Answer» C. Crystals | |
| 38. |
Size of filter paper is selected according to the amount of |
| A. | Solution |
| B. | Amount of insoluble solute |
| C. | Amount of soluble solute |
| D. | Amount of solvent |
| Answer» C. Amount of soluble solute | |
| 39. |
Gooch Crucibles are made up of |
| A. | Plastic |
| B. | Fibre |
| C. | Porcelain |
| D. | Steel |
| Answer» D. Steel | |