MCQOPTIONS
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MCQOPTIONS
This section includes 29 Mcqs, each offering curated multiple-choice questions to sharpen your Unit Processes knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Osmotic pressure cannot be used to determine the molecular weight. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
An important parameter in all polycondensations is the “extent of reaction”. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
What is the other name of ‘Pearl’ polymerisation? |
| A. | Emulsion |
| B. | Heterogeneous |
| C. | Suspension |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 4. |
During emulsion polymerisation particle size decreases. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
Bulk polymerization requires which type of monomer? |
| A. | Gaseous |
| B. | Liquid |
| C. | Both gaseous and liquid |
| D. | None of the mentionedView Answer |
| Answer» D. None of the mentionedView Answer | |
| 6. |
Which of the following can be produced using suspension polymerisation? |
| A. | Poly methyl methacrylate |
| B. | BUNA -S |
| C. | Teflon |
| D. | Polyethylene |
| Answer» B. BUNA -S | |
| 7. |
The final product can directly used for fabrication in emulsion polymerisation. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
The initiators used in the emulsion polymerisation is __________ |
| A. | Dibenzyl peroxide |
| B. | Per-sulphates |
| C. | n-hexane |
| D. | Silica nano particles |
| Answer» C. n-hexane | |
| 9. |
How many types of methods of polymerization are there? |
| A. | Two |
| B. | Three |
| C. | Four |
| D. | Five |
| Answer» B. Three | |
| 10. |
THE_INITIATORS_USED_IN_THE_EMULSION_POLYMERISATION_IS___________?$ |
| A. | Dibenzyl peroxide |
| B. | Per-sulphates |
| C. | n-hexane |
| D. | Silica nano particles |
| Answer» C. n-hexane | |
| 11. |
Which of the following can be produced using suspension polymerisation?$ |
| A. | Poly methyl methacrylate |
| B. | BUNA -S |
| C. | Teflon |
| D. | Polyethylene |
| Answer» B. BUNA -S | |
| 12. |
The_final_product_can_directly_used_for_fabrication_in_emulsion_polymerisation.$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 13. |
The heat obtained during the process of suspension polymerisation is _________ |
| A. | Uncontrolled |
| B. | Controlled |
| C. | Moderate |
| D. | Partially controlled |
| Answer» C. Moderate | |
| 14. |
which of the following is not used as stabilizers in the suspension polymerisation? |
| A. | Silica nano particles |
| B. | n-Hexane |
| C. | Heptane |
| D. | n-isopropylacrylamidein |
| Answer» D. n-isopropylacrylamidein | |
| 15. |
Depending on the morphology of the particles, the suspension polymerisation is carried out in ______ types. |
| A. | Five |
| B. | Four |
| C. | Three |
| D. | Two |
| Answer» E. | |
| 16. |
Which phenomena arise because of the requirements of thermodynamic equilibrium between two phases? |
| A. | Freezing-point depression |
| B. | Vapour-pressure drop |
| C. | Boiling-point elevation |
| D. | All of the mentioned |
| Answer» D. All of the mentioned | |
| 17. |
Which of the following do not synthesized by the emulsion polymerisation? |
| A. | Teflon |
| B. | BUNA -S |
| C. | Polystyrene |
| D. | Polyvinyl chloride |
| Answer» E. | |
| 18. |
The kinetics of ionic polymerization has common principles with which polymerization? |
| A. | Addition |
| B. | Pearl |
| C. | Free-radical |
| D. | Ion exchange |
| Answer» C. Free-radical | |
| 19. |
The emulsion polymerisation can be mainly for the typical monomers which undergo ____________ |
| A. | Ziegler-natta polymerisation |
| B. | Condensation polymerisation |
| C. | Chain radical polymerisation |
| D. | Co-ordination polymerisation |
| Answer» D. Co-ordination polymerisation | |
| 20. |
How is the degree of polymerization of the polymer obtained? |
| A. | Termination/ Propagation |
| B. | Propagation/ Termination |
| C. | Propagation* Termination |
| D. | None of the mentioned |
| Answer» B. Propagation/ Termination | |
| 21. |
The concentration of the micelle is measured as __________ |
| A. | Micelle concentration |
| B. | Critical micelle concentration |
| C. | Critical concentration |
| D. | Monomer concentration |
| Answer» C. Critical concentration | |
| 22. |
A water _____________ initiator is introduced into the water phase. |
| A. | Soluble |
| B. | Insoluble |
| C. | Partially soluble |
| D. | Neither soluble nor insoluble |
| Answer» B. Insoluble | |
| 23. |
What is the principal feature of a polycondensation? |
| A. | Stable intermediate |
| B. | Rate of condensation is independent |
| C. | All of the mentioned |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 24. |
Excess surfactant in water creates ___________ |
| A. | Micelle |
| B. | Monomer |
| C. | Emulsifying agent |
| D. | Emulsifier |
| Answer» B. Monomer | |
| 25. |
What is the other name of ‘Pearl’ polymerisation?$ |
| A. | Emulsion |
| B. | Heterogeneous |
| C. | Suspension |
| D. | None of the mentioned |
| Answer» B. Heterogeneous | |
| 26. |
A monomer is dispersed in a solution of_________ and ____________ forming the relatively large droplets of monomer. |
| A. | Micelle, water |
| B. | Surfactant, alcohol |
| C. | Surfactant, vinegar |
| D. | Surfactant, water |
| Answer» E. | |
| 27. |
Emulsion polymerization is a type of polymerization that occurs in emulsion droplets called __________ |
| A. | Emulsified droplets |
| B. | Micelle |
| C. | Emulsifying droplets |
| D. | Emulsifier droplets |
| Answer» C. Emulsifying droplets | |
| 28. |
What are the factors of solution polymerisation? |
| A. | Nature of solvent |
| B. | Concentration |
| C. | Temperature |
| D. | All of the mentioned |
| Answer» C. Temperature | |
| 29. |
What is the disadvantage of bulk polymerization? |
| A. | High temperature |
| B. | Heat control |
| C. | Need catalyst |
| D. | All of the mentioned |
| Answer» D. All of the mentioned | |