MCQOPTIONS
Saved Bookmarks
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. |
A tactic triad has three possible sequences, viz. (i) mm (ii) rr (iii) mr(or rm). |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
Atactic polymer is that in which? |
| A. | Alternate chiral centres have the same configuration |
| B. | Every third chiral centre has the same configuration |
| C. | Each chiral centre has the same configuration |
| D. | A complete random distribution of configuration is there |
| Answer» E. | |
| 3. |
When each chiral centre has the same configuration, the polymer is called ____________ |
| A. | Atactic |
| B. | Syndiotactic |
| C. | Isotactic |
| D. | Multitactic |
| Answer» D. Multitactic | |
| 4. |
The configuration of the isotactic dyad is ____________ |
| A. | Rectus |
| B. | Racemic |
| C. | Chiral |
| D. | Meso |
| Answer» E. | |
| 5. |
The polymer in which alternate chiral centres have the same configuration is called ____________ |
| A. | Syndiotactic |
| B. | Atactic |
| C. | Isotactic |
| D. | Multitactic |
| Answer» B. Atactic | |
| 6. |
Which of the following scientists won the noble prize for their work in polymer stereochemistry? |
| A. | Kurt Alder and Richard Abegg |
| B. | Peter Agre and Agricola |
| C. | Zeigler and Natta |
| D. | Friedrich Accum |
| Answer» D. Friedrich Accum | |
| 7. |
A tactic triad has three possible sequences, viz. (i) mm (ii) rr (iii) mr( or rm)? |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
Atactic polymer is that in which |
| A. | Alternate chiral centres have the same configuration |
| B. | Every third chiral centre has the same configuration |
| C. | Each chiral centre has the same configuration |
| D. | A complete random distribution of configuration is there |
| Answer» E. | |
| 9. |
When each chiral centre has the same configuration, the polymer is called |
| A. | Atactic |
| B. | Syndiotactic |
| C. | Isotactic |
| D. | Multitactic |
| Answer» D. Multitactic | |
| 10. |
The configuration of the isotactic dyad is |
| A. | Rectus |
| B. | Racemic |
| C. | Chiral |
| D. | Meso |
| Answer» E. | |
| 11. |
The tendency for a polymer to adopt crystalline morphology increases with __________ stereo regularity. |
| A. | Decreasing |
| B. | Increasing |
| C. | First increasing then decreasing |
| D. | First decreasing then increasing |
| Answer» C. First increasing then decreasing | |
| 12. |
The polymer in which alternate chiral centres have the same configuration is called |
| A. | Syndiotactic |
| B. | Atactic |
| C. | Isotactic |
| D. | Multitactic |
| Answer» B. Atactic | |
| 13. |
A tactic dyad has a segment of the polymer chain consisting of _________ monomeric units. |
| A. | 5 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 14. |
Which of the following scientists won the noble prize for their work in polymer stereochemistry? |
| A. | Kurt Alder and Richard Abegg |
| B. | Peter Agre and Agricola |
| C. | Zeigler and Natta |
| D. | Friedrich Accum |
| Answer» D. Friedrich Accum | |