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. |
Due to (+I) effect, the methyl groups are electron accepting in nature. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
On increasing the number of alkyl groups, the stability of carbanions ___________ |
| A. | Increases |
| B. | Decreases |
| C. | Remains same |
| D. | None of the mentioned |
| Answer» C. Remains same | |
| 3. |
Which of the following carbanion is most stable? |
| A. | 10 |
| B. | 20 |
| C. | 30 |
| D. | CH3 |
| Answer» E. | |
| 4. |
Negative charge of carbanion can be dispersed by ___________ |
| A. | (+I) effect and resonance |
| B. | (-I) effect and resonance |
| C. | Hyperconjugation |
| D. | (+M) effect and resonance |
| Answer» C. Hyperconjugation | |
| 5. |
The geometry of carbanion is ___________ |
| A. | Pyramidal |
| B. | Linear |
| C. | Tetrahedral |
| D. | Trigonal planar |
| Answer» B. Linear | |
| 6. |
The formal charge at the carbanion is ___________ |
| A. | 1 |
| B. | -1 |
| C. | 0 |
| D. | +2 |
| Answer» C. 0 | |
| 7. |
The hybridisation of carbanion is ____________ |
| A. | Sp |
| B. | Sp2 |
| C. | Sp3 |
| D. | Sp3d |
| Answer» D. Sp3d | |
| 8. |
ON_INCREASING_THE_NUMBER_OF_ALKYL_GROUPS,_THE_STABILITY_OF_CARBANIONS?$ |
| A. | Increases |
| B. | Decreases |
| C. | Remains same |
| D. | None of the mentioned |
| Answer» C. Remains same | |
| 9. |
Due_to_(+I)_effect,_the_methyl_groups_are_electron_accepting_in_nature.$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 10. |
Which of the following carbanion is least stable? |
| A. | 1<sup>0</sup> |
| B. | 2<sup>0</sup> |
| C. | 3<sup>0</sup> |
| D. | CH<sub>3</sub> |
| Answer» D. CH<sub>3</sub> | |
| 11. |
Negative charge of carbanion can be dispersed by |
| A. | (+I) effect and resonance |
| B. | (-I) effect and resonance |
| C. | Hyperconjugation |
| D. | (+M) effect and resonance |
| Answer» C. Hyperconjugation | |
| 12. |
The structure of carbanion is pyramidal but it undergoes rapid inversion similar to those of amines. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 13. |
The geometry of carbanion is |
| A. | Pyramidal |
| B. | Linear |
| C. | Tetrahedral |
| D. | Trigonal planar |
| Answer» B. Linear | |
| 14. |
The formal charge at the carbanion is |
| A. | +1 |
| B. | -1 |
| C. | 0 |
| D. | +2 |
| Answer» C. 0 | |
| 15. |
The hybridisation of carbanion is |
| A. | Sp |
| B. | Sp<sup>2</sup> |
| C. | Sp<sup>3</sup> |
| D. | Sp<sup>3</sup>d |
| Answer» D. Sp<sup>3</sup>d | |
| 16. |
Select the correct statement from the following option. |
| A. | Carbanion is the intermediate compound |
| B. | In carbanion, central carbon atom carries negative charge |
| C. | It possess an unshared pair of electron |
| D. | All of the mentioned |
| Answer» E. | |