MCQOPTIONS
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MCQOPTIONS
This section includes 11 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following is an application of polystyrene? |
| A. | Insulators for motors |
| B. | Dome-shaped covers for solar collectors |
| C. | Laminates for printed circuitry |
| D. | Containers for talcum powder |
| Answer» E. | |
| 2. |
Due to the chain stiffening effect of a benzene ring, polystyrene is hard but brittle. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
The softening temperature of polystyrene is ____________ |
| A. | 10-20 <sup>0</sup>C |
| B. | 30-50 <sup>0</sup>C |
| C. | 80-100 <sup>0</sup>C |
| D. | 120-150 <sup>0</sup>C |
| Answer» D. 120-150 <sup>0</sup>C | |
| 4. |
Polystyrene is prepared by ___________ polymerisation of styrene. |
| A. | Condensation |
| B. | Free radical |
| C. | Anionic |
| D. | Cationic |
| Answer» C. Anionic | |
| 5. |
Which of the following is an application of Teflon? |
| A. | Coatings of frying pans |
| B. | Combs and brush handles |
| C. | Audio cassettes |
| D. | Optical fibres |
| Answer» B. Combs and brush handles | |
| 6. |
Which of the following statement is incorrect about the Teflon? |
| A. | It has high density of the order 2.1 to 2.3 gm/cm<sup>3</sup> |
| B. | It has excellent electrical insulation properties |
| C. | It has high coefficient of friction |
| D. | It is dense and chemically inert |
| Answer» D. It is dense and chemically inert | |
| 7. |
Which of the following is used for making chewing gums? |
| A. | Perspex |
| B. | Polyvinyl acetate |
| C. | Teflon |
| D. | Polystyrene |
| Answer» C. Teflon | |
| 8. |
Which of the following is also known as lucite? |
| A. | Teflon |
| B. | Polyvinyl acetate |
| C. | Polystyrene |
| D. | Perspex |
| Answer» E. | |
| 9. |
Plasticized PVC is not used for making ____________ |
| A. | Baby-pants |
| B. | Bathroom curtaining |
| C. | Pipes for drainage |
| D. | Garden hose |
| Answer» D. Garden hose | |
| 10. |
The C-Cl dipole makes PVC a polymeric polar molecule. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 11. |
Which of the following act as a catalyst in the preparation of PVC? |
| A. | Lewis acid |
| B. | Benzoyl peroxide |
| C. | Potassium amide |
| D. | Grignard reagent |
| Answer» C. Potassium amide | |