MCQOPTIONS
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MCQOPTIONS
This section includes 6 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 does polymerization rate at a given monomer concentration vary, if rate of chain initiation is tripled? |
| A. | tdoubled |
| B. | ttripled |
| C. | tincrement by factor of 3<sup>0.5</sup> |
| D. | tremains constant |
| Answer» D. tremains constant | |
| 2. |
What is the expression for rate of termination reaction of free radical polymerization? |
| A. | tk<sub>t</sub>[M<sup> </sup>]<sup>2</sup> |
| B. | t2k<sub>t</sub>[M<sup> </sup>]<sup>2</sup> |
| C. | t2fk<sub>t</sub>[M<sup> </sup>] xa0 |
| D. | tfk<sub>t</sub>[M<sup> </sup>] xa0 |
| Answer» C. t2fk<sub>t</sub>[M<sup> </sup>] xa0 | |
| 3. |
What is the rate chain initiation reaction for initiator efficiency of 0.8, when concentration and decomposition rate of benzoyl peroxide are 4 mol/m3 and 3.24*10-6 m3/ mol-s-1, respectively? |
| A. | t2.07*10<sup>-5</sup> |
| B. | t1.57*10<sup>-5</sup> |
| C. | t3.27*10<sup>-5</sup> |
| D. | t1.03*10<sup>-5</sup> |
| Answer» B. t1.57*10<sup>-5</sup> | |
| 4. |
What is the expression for the rate of chain initiation of free radical chain growth polymerization? |
| A. | tfk<sub>d</sub>[I] xa0 |
| B. | t2fk<sub>d</sub>[I] xa0 |
| C. | tk<sub>d</sub>[I]/2 xa0 |
| D. | tk<sub>d</sub>[I] xa0 |
| Answer» C. tk<sub>d</sub>[I]/2 xa0 | |
| 5. |
What is the initiator efficiency in chain initiation step of free radical polymerization? |
| A. | tfraction of unreacted monomers |
| B. | textent of reaction |
| C. | tfraction of radicals actually contributing |
| D. | tnumber of initiator molecules |
| Answer» D. tnumber of initiator molecules | |
| 6. |
How many initiator fragments are present in the dead polymer formed by combination mode of chain termination? |
| A. | t2 |
| B. | t1 |
| C. | t3 |
| D. | t0 |
| Answer» B. t1 | |