MCQOPTIONS
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MCQOPTIONS
This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The polydispersity index can be less than 1. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
Calculate the number average molecular mass of a polymer having four different monomers A, B, C and D present in equal number. The molecular masses of the monomers are 10000, 15000, 30000 and 50000 respectively. |
| A. | 10050 |
| B. | 17350 |
| C. | 26250 |
| D. | 35475 |
| Answer» D. 35475 | |
| 3. |
The polydispersity index of natural polymers is _________ |
| A. | 0 |
| B. | <0.8 |
| C. | 1 |
| D. | >1.2 |
| Answer» D. >1.2 | |
| 4. |
Polydispersity index is defined as ______ where Mw and Mn are the weight average and number average molecular masses respectively. |
| A. | M<sub>w</sub> x M<sub>n</sub> |
| B. | M<sub>w</sub>/M<sub>n</sub> |
| C. | M<sub>n</sub>/M<sub>w</sub> |
| D. | M<sub>w</sub> M<sub>n</sub> |
| Answer» C. M<sub>n</sub>/M<sub>w</sub> | |
| 5. |
Molecular mass of polymers are expressed as a/an _______ |
| A. | average |
| B. | median |
| C. | mode |
| D. | percentage |
| Answer» B. median | |