MCQOPTIONS
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MCQOPTIONS
This section includes 12 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. |
How is the degree of polymerization affected with the increase in concentration of both monomer and liquid ammonia, when a monomer is polymerized anionically in liquid ammonia? |
| A. | increases |
| B. | decreases |
| C. | no change |
| D. | cannot be determined |
| Answer» E. | |
| 2. |
Which of the following monomers is more prone to form low-molecular weight polymer when polymerized in liquid ammonia? |
| A. | acrylonitrile |
| B. | metha acrylonitirile |
| C. | styrene |
| D. | methyl methacrylonitrile |
| Answer» D. methyl methacrylonitrile | |
| 3. |
WHICH_OF_THE_FOLLOWING_MONOMERS_IS_MORE_PRONE_TO_FORM_LOW-MOLECULAR_WEIGHT_POLYMER_WHEN_POLYMERIZED_IN_LIQUID_AMMONIA??$ |
| A. | acrylonitrile |
| B. | metha acrylonitirile |
| C. | styrene |
| D. | methyl methacrylonitrile |
| Answer» D. methyl methacrylonitrile | |
| 4. |
How_is_the_degree_of_polymerization_affected_with_the_increase_in_concentration_of_both_monomer_and_liquid_ammonia,_when_a_monomer_is_polymerized_anionically_in_liquid_ammonia?$ |
| A. | increases |
| B. | decreases |
| C. | no change |
| D. | cannot be determined |
| Answer» E. | |
| 5. |
Styrene is polymerized using amide catalyst in liquid ammonia, anionically. How will the rate of reaction change, if the monomer concentration is doubled (keeping rest other things constant)? |
| A. | doubled |
| B. | halved |
| C. | quadrupled |
| D. | No change |
| Answer» D. No change | |
| 6. |
What does the effectiveness of the catalyst in the initiation process of anionic polymerization depend on? |
| A. | acidity of the monomer |
| B. | basicity of the catalyst |
| C. | all of the mentioned |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 7. |
Which of the following can assist as a catalyst in anionic polymerization? |
| A. | Sulphuric acid |
| B. | Boron trifluoride |
| C. | grignard reagent |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| 8. |
The ease of anionic polymerization is dependent only on the catalyst system used for a given monomer. State true or false. |
| A. | true |
| B. | false |
| Answer» C. | |
| 9. |
What kind of substituent groups should be attached to the monomer, readily undergoing anionic polymerization? |
| A. | electron accepting |
| B. | electron releasing |
| C. | all of the mentioned |
| D. | none of the mentioned |
| Answer» B. electron releasing | |
| 10. |
Which of the following nature of solvent can inhibit the growth of polymer in anionic polymerization? |
| A. | acidic |
| B. | basic |
| C. | neutral |
| D. | none of the mentioned |
| Answer» B. basic | |
| 11. |
Which of the following monomer has the least reactivity towards anionic polymerization? |
| A. | acrylonitrile |
| B. | methyl metharylate |
| C. | butadiene |
| D. | methacrylonitrile |
| Answer» D. methacrylonitrile | |
| 12. |
How the termination in anionic polymerization most probably does take place? |
| A. | unimolecular termination |
| B. | bimolecular |
| C. | termination by solvent transfer |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |