MCQOPTIONS
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MCQOPTIONS
This section includes 17 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Retardation factor is the ratio of ____________ |
| A. | Distance moved by substance from base line to distance moved by the solvent from base line |
| B. | Distance moved by solvent from base line to distance moved by the substance from base line |
| C. | Distance moved by substance from top line to distance moved by the solvent from top line |
| D. | Distance moved by solvent from top line to distance moved by the substance from top line |
| Answer» B. Distance moved by solvent from base line to distance moved by the substance from base line | |
| 2. |
Paper chromatography is based on continuous differential partitioning of components of a mixture between stationary and mobile phases. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
Amino acids detected by spraying the plate with ninhydrin solution is an example of ____________ |
| A. | Column chromatography |
| B. | Thin layer chromatography |
| C. | Paper chromatography |
| D. | Liquid chromatography |
| Answer» D. Liquid chromatography | |
| 4. |
The relative adsorption of each component of the mixture is expressed in terms of its ____________ |
| A. | Acceleration factor |
| B. | Retardation factor |
| C. | Both acceleration and retardation factor |
| D. | None of the mentioned |
| Answer» C. Both acceleration and retardation factor | |
| 5. |
Select the incorrect statement from the following options. |
| A. | The spots of colorless compounds are invisible to the eyes |
| B. | These spots can be detected by putting the plate under ultraviolet light |
| C. | These spots can be detected by placing the plate in a covered jar containing iodine crystals |
| D. | None of the mentioned |
| Answer» E. | |
| 6. |
The eluant filled in the closed jar is ____________ |
| A. | Mixture of gases |
| B. | Mixture of a liquid and a gas |
| C. | Mixture of solids |
| D. | Mixture of liquids |
| Answer» E. | |
| 7. |
The chromaplate or thin layer chromatography plate is made up of ____________ |
| A. | Glass |
| B. | Wood |
| C. | Fibre |
| D. | Metal |
| Answer» B. Wood | |
| 8. |
The size of a thin layer of adsorbent is about ____________ |
| A. | 0.1 mm |
| B. | 0.2 mm |
| C. | 0.3 mm |
| D. | 0.4 mm |
| Answer» C. 0.3 mm | |
| 9. |
The principle on which thin layer chromatography is based is that the ____________ |
| A. | Different compounds are absorbed on an absorbent to different degrees |
| B. | Different compounds are absorbed on an absorbent to same degrees |
| C. | Different compounds are adsorbed on an adsorbent to different degrees |
| D. | Different compounds are absorbed on an absorbent to same degrees |
| Answer» D. Different compounds are absorbed on an absorbent to same degrees | |
| 10. |
RETARDATION_FACTOR_IS_THE_RATIO_OF?$ |
| A. | Distance moved by substance from base line to distance moved by the solvent from base line |
| B. | Distance moved by solvent from base line to distance moved by the substance from base line |
| C. | Distance moved by substance from top line to distance moved by the solvent from top line |
| D. | Distance moved by solvent from top line to distance moved by the substance from top line |
| Answer» B. Distance moved by solvent from base line to distance moved by the substance from base line | |
| 11. |
PAPER_CHROMATOGRAPHY_IS_BASED_ON_CONTINUOUS_DIFFERENTIAL_PARTITIONING_OF_COMPONENTS_OF_A_MIXTURE_BETWEEN_STATIONARY_AND_MOBILE_PHASES.?$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 12. |
Amino acids detected by spraying the plate with ninhydrin solution is an example o? |
| A. | Column chromatography |
| B. | Thin layer chromatography |
| C. | Paper chromatography |
| D. | Liquid chromatography |
| Answer» D. Liquid chromatography | |
| 13. |
The relative adsorption of each components of the mixture is expressed in terms of its |
| A. | Acceleration factor |
| B. | Retardation factor |
| C. | Both acceleration and retardation factor |
| D. | None of the mentioned |
| Answer» C. Both acceleration and retardation factor | |
| 14. |
The eluant filled in the closed jar is |
| A. | Mixture of gases |
| B. | Mixture of a liquid and a gas |
| C. | Mixture of solids |
| D. | Mixture of liquids |
| Answer» E. | |
| 15. |
The chromaplate or thin layer chromatography plate is made up of |
| A. | Glass |
| B. | Wood |
| C. | Fibre |
| D. | Metal |
| Answer» B. Wood | |
| 16. |
The size of a thin layer of adsorbent is about |
| A. | 0.1 mm |
| B. | 0.2 mm |
| C. | 0.3 mm |
| D. | 0.4 mm |
| Answer» C. 0.3 mm | |
| 17. |
The principle on which thin layer chromatography is based is that the |
| A. | Different compounds are absorbed on an absorbent to different degrees |
| B. | Different compounds are absorbed on an absorbent to same degrees |
| C. | Different compounds are adsorbed on an adsorbent to different degrees |
| D. | Different compounds are absorbed on an absorbent to same degrees |
| Answer» D. Different compounds are absorbed on an absorbent to same degrees | |