MCQOPTIONS
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MCQOPTIONS
This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Analytical Instrumentation knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following properties of molecular sieves make it ideal for exclusion mechanism of separation? |
| A. | High thermal stability |
| B. | Large inner surface area |
| C. | Variable framework charge |
| D. | Ability to distinguish materials on the basis of their size |
| Answer» E. | |
| 2. |
Which of the following is a special adsorbent used in gas-solid chromatography? |
| A. | Molecular sieves |
| B. | Silica gel |
| C. | Alumina |
| D. | Starch |
| Answer» B. Silica gel | |
| 3. |
Gas-solid chromatography can be used only for separation of certain low molecular weight gaseous species. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
WHICH_OF_THE_FOLLOWING_IS_A_SPECIAL_ADSORBENT_USED_IN_GAS-SOLID_CHROMATOGRAPHY??$ |
| A. | Molecular sieves |
| B. | Silica gel |
| C. | Alumina |
| D. | Starch |
| Answer» B. Silica gel | |
| 5. |
Which_of_the_following_properties_of_molecular_sieves_make_it_ideal_for_exclusion_mechanism_of_separation?$ |
| A. | High thermal stability |
| B. | Large inner surface area |
| C. | Variable framework charge |
| D. | Ability to distinguish materials on the basis of their size |
| Answer» E. | |
| 6. |
Gas-solid chromatography can be used only for separation of certain low molecular weight gaseous species? |
| A. | True |
| B. | False |
| Answer» B. False | |
| 7. |
Which of the following is not a disadvantage of gas-solid chromatography? |
| A. | Strong retention of polar solutes |
| B. | Lifetime is short |
| C. | Occurrence of catalytic changes |
| D. | Cannot be used for very wide range of components |
| Answer» C. Occurrence of catalytic changes | |
| 8. |
Which of the following is not an advantage for the conversion of packed columns into wide bore capillaries? |
| A. | Longer retention times |
| B. | Longer life |
| C. | Higher efficiency |
| D. | Greater inertness |
| Answer» B. Longer life | |
| 9. |
Which of the following columns can be used in Gas-solid chromatography? |
| A. | Open tubular column |
| B. | Analytical column |
| C. | Separation column |
| D. | Guard column |
| Answer» B. Analytical column | |
| 10. |
The distribution coefficients of Gas-solid chromatography are greater than that of Gas-liquid chromatography. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 11. |
Which of the following is not an advantage of gas-solid chromatography? |
| A. | Increased column life |
| B. | Can be used for separation of rare gases |
| C. | Leads to semi-permanent retention of analyte |
| D. | Ability to retain some components that cannot be easily retained by other gas chromatography method |
| Answer» D. Ability to retain some components that cannot be easily retained by other gas chromatography method | |
| 12. |
Which of the following components cannot be retained by gas-liquid columns but can be separated by using gas-solid chromatography? |
| A. | Formaldehyde |
| B. | Hydrogen sulphide |
| C. | Benzene |
| D. | Carbon dioxide |
| Answer» C. Benzene | |
| 13. |
Gas-solid chromatography is based on which of the following processes? |
| A. | Partition of the analyte between a gaseous mobile phase and a stationary liquid phase |
| B. | Adsorption of gaseous substances on solid surface |
| C. | Ion exchange |
| D. | Large molecules cannot penetrate through the gel |
| Answer» C. Ion exchange | |