MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The Raman shift, related to force constant k and reduced mass μ, is given by ________ |
| A. | \(\frac{1}{2π}\sqrt{\frac{k}{μ}}\) |
| B. | \(\frac{1}{2πc}\sqrt{\frac{k}{μ}}\) |
| C. | \(\frac{1}{2π}\sqrt{\frac{μ}{k}}\) |
| D. | \(\frac{1}{2πc}\sqrt{\frac{μ}{k}}\) |
| Answer» C. \(\frac{1}{2π}\sqrt{\frac{μ}{k}}\) | |
| 2. |
Infrared and Raman spectra are complementary to each other. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
For a particular vibrational mode to appear in the Raman spectrum, what must change? |
| A. | Frequency of radiation |
| B. | Intensity of radiation |
| C. | Molecule’s shape |
| D. | Molecule’s polarizability |
| Answer» E. | |
| 4. |
Which of the following lines are most intense? |
| A. | Stokes lines |
| B. | Rayleigh-scattered lines |
| C. | Anti-strokes lines |
| D. | All have same intensity |
| Answer» C. Anti-strokes lines | |
| 5. |
The most commonly used laser for Raman spectroscopy is ___________ |
| A. | ND: YAG |
| B. | Ruby laser |
| C. | He-Ne laser |
| D. | Semiconductor Laser |
| Answer» D. Semiconductor Laser | |
| 6. |
Which of the following stands for the Rayleigh scattering in the Raman spectra shown below? |
| A. | X |
| B. | Y |
| C. | Z |
| D. | None |
| Answer» C. Z | |
| 7. |
Raman lines are ________ |
| A. | Weak |
| B. | Strong |
| C. | Curved |
| D. | Blurry |
| Answer» B. Strong | |
| 8. |
The Rama shift generally lies between ________ |
| A. | 100 – 1000 cm-1 |
| B. | 100 – 2000 cm-1 |
| C. | 100 – 3000 cm-1 |
| D. | 100 – 4000 cm-1 |
| Answer» E. | |
| 9. |
The Raman spectrum is said to consist of Strokes lines when ________ |
| A. | Δv > 0 |
| B. | Δv < 0 |
| C. | Δv = 0 |
| D. | Does not depend on Δv |
| Answer» B. Δv < 0 | |
| 10. |
The change in frequency is due to the transition between vibrational or rotational energy levels. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 11. |
In Raman spectroscopy, the radiation lies in the ________ |
| A. | Microwave Region |
| B. | Visible Region |
| C. | UV Region |
| D. | X-ray Region |
| Answer» C. UV Region | |
| 12. |
How many degrees of freedom does a chemical compound of N atoms have? |
| A. | 2N |
| B. | 2N + 1 |
| C. | 3N |
| D. | 3N + 1 |
| Answer» D. 3N + 1 | |
| 13. |
Which of the following cannot be conserved during Raman scattering? |
| A. | Total Energy |
| B. | Momentum |
| C. | Kinetic Energy |
| D. | Electronic Energy |
| Answer» D. Electronic Energy | |
| 14. |
The elastic scattering of photons is called as ______ |
| A. | Atmospheric scattering |
| B. | Rayleigh Scattering |
| C. | Conserved Scattering |
| D. | Raman Scattering |
| Answer» C. Conserved Scattering | |
| 15. |
Raman effect is scattering of ________ |
| A. | Atoms |
| B. | Molecules |
| C. | Protons |
| D. | Photons |
| Answer» E. | |