MCQOPTIONS
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MCQOPTIONS
This section includes 5 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. |
The softening temperature of HDPE is ____________ |
| A. | 20<sup>0</sup>C |
| B. | 85<sup>0</sup>C |
| C. | 135<sup>0</sup>C |
| D. | 150<sup>0</sup>C |
| Answer» D. 150<sup>0</sup>C | |
| 2. |
The ethylene is polymerised under in the presence of ____________ |
| A. | Zeigler Natta catalyst |
| B. | Supported metal oxide catalyst |
| C. | Lewis acids catalyst |
| D. | Friedel crafts catalyst |
| Answer» B. Supported metal oxide catalyst | |
| 3. |
The crystallinity of LDPE is ____________ |
| A. | 10% |
| B. | 30% |
| C. | 55% |
| D. | 80-90% |
| Answer» D. 80-90% | |
| 4. |
LDPE is prepared by polymerising ethylene at a pressure of ____________ |
| A. | 100-200 atmospheres |
| B. | 1000-5000 atmospheres |
| C. | 10-100 atmospheres |
| D. | 2-10 atmospheres |
| Answer» C. 10-100 atmospheres | |
| 5. |
The thermoplastic is ____________ |
| A. | Cross-linked |
| B. | Insoluble |
| C. | Amorphous |
| D. | Held by a covalent bond |
| Answer» D. Held by a covalent bond | |