MCQOPTIONS
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MCQOPTIONS
This section includes 16 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. |
Sample recovery is possible after spectroscopic analysis because the sample is not chemically affected. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
The criteria for electronic spin resonance is ____________ |
| A. | Periodic change in polarisability |
| B. | Spin quantum number of nuclei > 0 |
| C. | Presence of unpaired electron in a molecule |
| D. | Presence of chromophore in a molecule |
| Answer» D. Presence of chromophore in a molecule | |
| 3. |
The transition zone for Raman spectra is __________ |
| A. | Between vibrational and rotational levels |
| B. | Between electronic levels |
| C. | Between magnetic levels of nuclei |
| D. | Between magnetic levels of unpaired electrons |
| Answer» B. Between electronic levels | |
| 4. |
The region of electromagnetic spectrum for nuclear magnetic resonance is __________ |
| A. | Microwave |
| B. | Radio frequency |
| C. | Infrared |
| D. | UV-rays |
| Answer» C. Infrared | |
| 5. |
The correct order of different types of energies is __________ |
| A. | Eel >> Evib >> Erot >> E tr |
| B. | Eel >> Erot >> Evib >> E tr |
| C. | Eel >> Evib >> Etr >> E rot |
| D. | Etr >> Evib >> Erot >> E el |
| Answer» B. Eel >> Erot >> Evib >> E tr | |
| 6. |
During the motion, if the centre of gravity of molecule changes, the molecule possess __________ |
| A. | Electronic energy |
| B. | Rotational energy |
| C. | Translational energy |
| D. | Vibrational energy |
| Answer» D. Vibrational energy | |
| 7. |
The different types of energies associated with a molecule are __________ |
| A. | Electronic energy |
| B. | Vibrational energy |
| C. | Rotational energy |
| D. | All of the mentioned |
| Answer» E. | |
| 8. |
THE_CRITERIA_FOR_ELECTRONIC_SPIN_RESONANCE_IS?$ |
| A. | Periodic change in polarisability |
| B. | Spin quantum number of nuclei > 0 |
| C. | Presence of unpaired electron in a molecule |
| D. | Presence of chromophore in a molecule |
| Answer» D. Presence of chromophore in a molecule | |
| 9. |
Sample_recovery_is_possible_after_spectroscopic_analysis_because_sample_is_not_chemically_affected.$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
The transition zone for Raman spectra i? |
| A. | Between vibrational and rotational levels |
| B. | Between electronic levels |
| C. | Between magnetic levels of nuclei |
| D. | Between magnetic levels of unpaired electrons |
| Answer» B. Between electronic levels | |
| 11. |
The results obtained by spectroscopic methods are less reliable, less reproducible and incorrect than classical methods. |
| A. | True |
| B. | False |
| Answer» C. | |
| 12. |
Which of the following is an application of molecular spectroscopy? |
| A. | Structural investigation |
| B. | Basis of understanding of colors |
| C. | Study of energetically excited reaction products |
| D. | All of the mentioned |
| Answer» E. | |
| 13. |
The region of electromagnetic spectrum for nuclear magnetic resonance is |
| A. | Microwave |
| B. | Radio frequency |
| C. | Infrared |
| D. | UV-rays |
| Answer» C. Infrared | |
| 14. |
The correct order of different types of energies is |
| A. | E<sub>el</sub> >> E<sub>vib</sub> >> E<sub>rot</sub> >> E <sub>tr</sub> |
| B. | E<sub>el</sub> >> E<sub>rot</sub> >> E<sub>vib</sub> >> E <sub>tr</sub> |
| C. | E<sub>el</sub> >> E<sub>vib</sub> >> E<sub>tr</sub> >> E <sub>rot</sub> |
| D. | E<sub>tr</sub> >> E<sub>vib</sub> >> E<sub>rot</sub> >> E <sub>el</sub> |
| Answer» B. E<sub>el</sub> >> E<sub>rot</sub> >> E<sub>vib</sub> >> E <sub>tr</sub> | |
| 15. |
During the motion, if the centre of gravity of molecule changes, the molecule possess |
| A. | Electronic energy |
| B. | Rotational energy |
| C. | Translational energy |
| D. | Vibrational energy |
| Answer» D. Vibrational energy | |
| 16. |
The different types of energies associated with a molecule are |
| A. | Electronic energy |
| B. | Vibrational energy |
| C. | Rotational energy |
| D. | All of the mentioned |
| Answer» E. | |