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 molecule will show highest dipole moment? |
| A. | CH3Cl |
| B. | CH3Br |
| C. | CH3F |
| D. | CH3I |
| Answer» D. CH3I | |
| 2. |
Those groups which are electron repelling and have lesser electron attracting power than hydrogen show __________ |
| A. | (+E) effect |
| B. | (-E) effect |
| C. | (-I) effect |
| D. | (+I) effect |
| Answer» E. | |
| 3. |
Lewis acids are examples of nucleophilic reagents. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
The positively charged and electron deficient compounds which have a tendency to form a bond by accepting the electron pair are known as __________ |
| A. | Electrophiles |
| B. | Nucleophiles |
| C. | Homophiles |
| D. | All of the mentioned |
| Answer» B. Nucleophiles | |
| 5. |
When the complete transfer of π-electrons take place away from the atom at the requirement of attacking agent, it is called __________ |
| A. | (-E) effect |
| B. | (+E) effect |
| C. | (-I) effect |
| D. | (+I) effect |
| Answer» C. (-I) effect | |
| 6. |
THOSE_GROUPS_WHICH_ARE_ELECTRON_REPELLING_AND_HAVE_LESSER_ELECTRON_ATTRACTING_POWER_THAN_HYDROGEN_SHOW?$ |
| A. | (+E) effect |
| B. | (-E) effect |
| C. | (-I) effect |
| D. | (+I) effect |
| Answer» E. | |
| 7. |
Which_of_the_following_molecule_will_show_highest_dipole_moment?$ |
| A. | CH<sub>3</sub>Cl |
| B. | CH<sub>3</sub>Br |
| C. | CH<sub>3</sub>F |
| D. | CH<sub>3</sub>I |
| Answer» D. CH<sub>3</sub>I | |
| 8. |
Lewis acids are the examples of nucleophilic reagents? |
| A. | True |
| B. | False |
| Answer» C. | |
| 9. |
Which of the following is an incorrect statement about the nucleophiles? |
| A. | They are electron rich |
| B. | They possess an empty orbital to receive the electron pair |
| C. | They attack electron deficient centres |
| D. | Examples are: OH<sup>–</sup>, NH<sub>3</sub>, H<sub>2</sub>O etc |
| Answer» C. They attack electron deficient centres | |
| 10. |
Which of the following is an example of lewis base? |
| A. | ZnCl<sub>2</sub> |
| B. | BF<sub>3</sub> |
| C. | NH<sub>3</sub> |
| D. | FeCl<sub>2</sub> |
| Answer» D. FeCl<sub>2</sub> | |
| 11. |
The positively charged and electron deficient compounds which have a tendency to form a bond by accepting the electron pair are known as |
| A. | Electrophiles |
| B. | Nucleophiles |
| C. | Homophiles |
| D. | All of the mentioned |
| Answer» B. Nucleophiles | |
| 12. |
When the complete transfer of π-electrons take place away from the atom at the requirement of attacking agent, it is called$ |
| A. | (-E) effect |
| B. | (+E) effect |
| C. | (-I) effect |
| D. | (+I) effect |
| Answer» C. (-I) effect | |
| 13. |
Select the correct statement from the following option |
| A. | When multiple bonds are present between two different atoms, electromeric shift towards the more electronegative atom takes place |
| B. | When multiple bonds are present between two similar atoms, the first possibility is symmetric alkenes or alkynes |
| C. | When multiple bonds are present between two similar atoms, the second possibility is asymmetric alkenes or alkynes |
| D. | All of the mentioned |
| Answer» E. | |
| 14. |
Which of the following is a temporary effect brought into play at the requirement of attacking reagent? |
| A. | Inductive effect |
| B. | Mesomeric effect |
| C. | Electromeric effect |
| D. | Inductomeric effect |
| Answer» D. Inductomeric effect | |