MCQOPTIONS
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MCQOPTIONS
This section includes 11 Mcqs, each offering curated multiple-choice questions to sharpen your Polymer Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following factors does termination mechanism depend on? |
| A. | type of active centre |
| B. | nature of monomer |
| C. | reaction conditions |
| D. | all of the mentioned |
| Answer» E. | |
| 2. |
Which of the following can activate chain initiation? |
| A. | heat |
| B. | light or radiation |
| C. | catalysts |
| D. | all of the mentionedView Answer |
| Answer» E. | |
| 3. |
WHICH_OF_THE_FOLLOWING_FACTORS_DOES_TERMINATION_MECHANISM_DEPEND_ON??$ |
| A. | type of active centre |
| B. | nature of monomer |
| C. | reaction conditions |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| 4. |
Which of the following mechanism can occur for the termination step to take place? |
| A. | combination |
| B. | disproportionation |
| C. | all of the mentioned |
| D. | none of the mentioned |
| Answer» C. all of the mentioned | |
| 5. |
The substance that is so effective, which can suppress the rate as well as degree of polymerization is a ___________ |
| A. | retarder |
| B. | inhibitor |
| C. | promoter |
| D. | none of the mentioned |
| Answer» C. promoter | |
| 6. |
Which mode in the chain termination step is accompanied by a transfer of hydrogen molecule? |
| A. | combination |
| B. | disproportionation |
| C. | propagation |
| D. | all of the mentioned |
| Answer» B. disproportionation | |
| 7. |
Which is the rate determining step of chain initiation step? |
| A. | initiator decomposition |
| B. | chain initiation of monomer |
| C. | chain propagation |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 8. |
What does chain initiation step of free radical polymerization consists of? |
| A. | decomposition of initiator |
| B. | addition of free radical to monomer |
| C. | all of the mentioned |
| D. | none of the mentioned |
| Answer» C. all of the mentioned | |
| 9. |
Which of the following cannot initiate the chain reaction in polymerization of acrylo-nitrile? |
| A. | anion |
| B. | cation |
| C. | free radical |
| D. | coordination |
| Answer» D. coordination | |
| 10. |
Why is addition polymerization also known as vinyl polymerization? |
| A. | monomers are unsaturated compounds |
| B. | its a chain reaction |
| C. | most monomers contain (CH<sub>2</sub>═CH─) group |
| D. | all of the mentioned |
| Answer» E. | |
| 11. |
Which of the following monomers cannot undergo chain growth polymerization? |
| A. | CH<sub>2</sub>‚ïê CH<sub>2</sub> |
| B. | CH<sub>2</sub>‚ïêCHCN |
| C. | CH<sub>2</sub>‚ïêCHCOOR |
| D. | COOH‚àíCH<sub>2</sub>‚àíCOOH |
| Answer» E. | |