MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 10 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. |
What is the unit of molar absorptivity or absorptivity which is used to determine absorbance A in Beer Lambert s formula? |
| A. | L mol<sup>-1</sup> cm<sup>-1</sup> |
| B. | L gm<sup>-1</sup> cm<sup>-1</sup> |
| C. | Cm |
| D. | No unit |
| Answer» B. L gm<sup>-1</sup> cm<sup>-1</sup> | |
| 2. |
What is the unit of absorbance which can be derived from Beer Lambert s law? |
| A. | L mol<sup>-1</sup> cm<sup>-1</sup> |
| B. | L gm<sup>-1</sup> cm<sup>-1</sup> |
| C. | Cm |
| D. | No unit |
| Answer» E. | |
| 3. |
Transmittance is given as T = P/Po. If Po is the power incident on the sample, what does P represent? |
| A. | Radiant power transmitted by the sample |
| B. | Radiant power absorbed by the sample |
| C. | Sum of powers absorbed and scattered |
| D. | Sum of powers transmitted and reflected |
| Answer» B. Radiant power absorbed by the sample | |
| 4. |
Which of the following is not true about Absorption spectroscopy? |
| A. | It involves transmission |
| B. | Scattering is kept minimum |
| C. | Reflection is kept maximum |
| D. | Intensity of radiation leaving the substance is an indication of a concentration |
| Answer» D. Intensity of radiation leaving the substance is an indication of a concentration | |
| 5. |
The representation of Beer Lambert s law is given as A = abc. If b represents distance, c represents concentration and A represents absorption, what does a represent? |
| A. | Intensity |
| B. | Transmittance |
| C. | Absorptivity |
| D. | Admittance |
| Answer» D. Admittance | |
| 6. |
Lambert s law states that the intensity of light decreases with respect to __________ |
| A. | Concentration |
| B. | Distance |
| C. | Composition |
| D. | Volume |
| Answer» C. Composition | |
| 7. |
Beer s law states that the intensity of light decreases with respect to ___________ |
| A. | Concentration |
| B. | Distance |
| C. | Composition |
| D. | Volume |
| Answer» B. Distance | |
| 8. |
Which of the following is not a limitation of Beer Lambert s law, which gives the relation between absorption, thickness and concentration? |
| A. | Concentration must be lower |
| B. | Radiation must have higher bandwidth |
| C. | Radiation source must be monochromatic |
| D. | Does not consider factors other than thickness and concentration that affect absorbance |
| Answer» C. Radiation source must be monochromatic | |
| 9. |
In which of the following ways, absorption is related to transmittance? |
| A. | Absorption is the logarithm of transmittance |
| B. | Absorption is the reciprocal of transmittance |
| C. | Absorption is the negative logarithm of transmittance |
| D. | Absorption is a multiple of transmittance |
| Answer» D. Absorption is a multiple of transmittance | |
| 10. |
Beer Lambert s law gives the relation between which of the following? |
| A. | Reflected radiation and concentration |
| B. | Scattered radiation and concentration |
| C. | Energy absorption and concentration |
| D. | Energy absorption and reflected radiation |
| Answer» D. Energy absorption and reflected radiation | |