MCQOPTIONS
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MCQOPTIONS
This section includes 10 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. |
What role does nitrobenzene play for the polymerization of methyl acrylate? |
| A. | inhibitor |
| B. | retarder |
| C. | chain transfer agent |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 2. |
WHAT_ROLE_DOES_NITROBENZENE_PLAY_FOR_THE_POLYMERIZATION_OF_METHYL_ACRYLATE??$ |
| A. | inhibitor |
| B. | retarder |
| C. | chain transfer agent |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 3. |
What is the necessary condition for hydroquinone to be used as inhibitors? |
| A. | presence of α-hydrogen |
| B. | presence of oxygen |
| C. | presence of ring |
| D. | none of the mentioned |
| Answer» C. presence of ring | |
| 4. |
What happens to the rate of polymerization at the end of inhibition period as compared to the rate for uninhibited monomer, when oxygen is used as an inhibitor? |
| A. | recedes |
| B. | exceeds |
| C. | remains same |
| D. | none of the mentioned |
| Answer» C. remains same | |
| 5. |
Where has the role of aromatic nitro compounds as an inhibitor or retarder been unsuccessful? |
| A. | styrene polymerization |
| B. | vinyl acetate polymerization |
| C. | acrylate polymerization |
| D. | vinyl chloride polymerization |
| Answer» D. vinyl chloride polymerization | |
| 6. |
What does the stoichiometric ratio and nature of products formed depends on, when the reaction of inhibitor radicals and chain radicals leads to copolymerization? |
| A. | nature of monomer |
| B. | initiator |
| C. | solvent |
| D. | all of the mentioned |
| Answer» E. | |
| 7. |
The inhibition period is proportional to the monomer concentration in the system. State true or false. |
| A. | true |
| B. | false |
| Answer» C. | |
| 8. |
What is the order of inhibitor consumption in an inhibition process? |
| A. | first |
| B. | second |
| C. | zero |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 9. |
Which of the following has the highest practical utility as an inhibitor? |
| A. | benzoquinone |
| B. | t-butyl catechol |
| C. | nitro benzene |
| D. | DPPH |
| Answer» E. | |
| 10. |
The substance that reduces the rate and degree of polymerization, without halting the propagation process, is called a___________ |
| A. | retarder |
| B. | inhibitor |
| C. | modifier |
| D. | regulator |
| Answer» B. inhibitor | |