MCQOPTIONS
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MCQOPTIONS
This section includes 14 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. |
Which of the following is a limitation of the Lambert-Beer’s law? |
| A. | Scattering of light due to particles |
| B. | Fluorescence of sample |
| C. | Non-monochromatic radiation |
| D. | All of the mentioned |
| Answer» E. | |
| 2. |
What will be the absorbance if %T = 80? |
| A. | 0.5 |
| B. | 0.05 |
| C. | 0.097 |
| D. | 0.97 |
| Answer» D. 0.97 | |
| 3. |
Which of the following is an application of electronic spectroscopy? |
| A. | Detection of impurities |
| B. | Control of purification |
| C. | Study of kinetics of the chemical reaction |
| D. | All of the mentioned |
| Answer» E. | |
| 4. |
The electronic spectra in the visible range span is __________ |
| A. | 25000-72000 cm-1 |
| B. | 25000-50000 cm-1 |
| C. | 12500-25000 cm-1 |
| D. | 15000-30000 cm-1 |
| Answer» D. 15000-30000 cm-1 | |
| 5. |
WHAT_WILL_BE_THE_ABSORBANCE_IF_%T=_80??$ |
| A. | 0.5 |
| B. | 0.05 |
| C. | 0.097 |
| D. | 0.97 |
| Answer» D. 0.97 | |
| 6. |
Which_of_the_following_is_a_limitation_of_the_Lambert-Beer’s_law?$# |
| A. | Scattering of light due to particles |
| B. | Fluorescence of sample |
| C. | Non-monochromatic radiation |
| D. | All of the mentioned |
| Answer» E. | |
| 7. |
Which of the following is an application of electronic spectroscopy? |
| A. | Detection of impurities |
| B. | Control of purification |
| C. | Study of kinetics of the chemical reaction |
| D. | All of the mentioned |
| Answer» E. | |
| 8. |
Which of the following shift leads to the decreased intensity of absorption? |
| A. | Hypochromic |
| B. | Hyperchromic |
| C. | Hypsochromic |
| D. | Bathochromic |
| Answer» B. Hyperchromic | |
| 9. |
Which of the following is not an auxochrome group? |
| A. | –OH |
| B. | –SH |
| C. | –OR |
| D. | –O<sub>2</sub> |
| Answer» E. | |
| 10. |
Which of the following organic compound shows transition due to conjugation? |
| A. | Alkenes |
| B. | Saturated aliphatic ketones |
| C. | Conjugated dienes |
| D. | Alkanes |
| Answer» D. Alkanes | |
| 11. |
What is the position of the band of alkanes? |
| A. | 190 nm |
| B. | 185 nm |
| C. | 217 nm |
| D. | 150 nm |
| Answer» E. | |
| 12. |
Arrange the various electronic transitions in the order of increasing energy. |
| A. | n→σ<sup>*</sup> < π→π<sup>*</sup> < n→π<sup>*</sup> < σ→σ<sup>*</sup> |
| B. | n→π<sup>*</sup> < π→π<sup>*</sup> < n→σ<sup>*</sup> < σ→σ<sup>*</sup> |
| C. | n→σ<sup>*</sup> < n→π<sup>*</sup> < π→π<sup>*</sup> < σ→σ<sup>*</sup> |
| D. | σ→σ<sup>*</sup> < π→π<sup>*</sup> < n→π<sup>*</sup> < n→σ<sup>*</sup> |
| Answer» C. n‚Äö√Ñ√∂‚àö√∫‚àö‚ↂâà√¨‚àö√¢<sup>*</sup> < n‚Äö√Ñ√∂‚àö√∫‚àö‚ↂâà√¨‚àö√ë<sup>*</sup> < ‚âà√¨‚àö√ë‚Äö√Ñ√∂‚àö√∫‚àö‚ↂâà√¨‚àö√ë<sup>*</sup> < ‚âà√¨‚àö√¢‚Äö√Ñ√∂‚àö√∫‚àö‚ↂâà√¨‚àö√¢<sup>*</sup> | |
| 13. |
Which of the following transitions are of weak intensities and lie in the visible region? |
| A. | n‚Üín<sup>*</sup> |
| B. | σ→σ<sup>*</sup> |
| C. | π→π<sup>*</sup> |
| D. | n→σ<sup>*</sup> |
| Answer» B. ‚âà√¨‚àö√¢‚Äö√Ñ√∂‚àö√∫‚àö‚ↂâà√¨‚àö√¢<sup>*</sup> | |
| 14. |
The electronic spectra in the visible range span |
| A. | 25000-72000 cm<sup>-1</sup> |
| B. | 25000-50000 cm<sup>-1</sup> |
| C. | 12500-25000 cm<sup>-1</sup> |
| D. | 15000-30000 cm<sup>-1</sup> |
| Answer» D. 15000-30000 cm<sup>-1</sup> | |