MCQOPTIONS
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MCQOPTIONS
This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Orlon is |
| A. | a copolymer. |
| B. | a condensation polymer. |
| C. | obtained by polymerising vinyl cyanide. |
| D. | all (a), (b) and (c). |
| Answer» D. all (a), (b) and (c). | |
| 2. |
Polycaprolactum (Nylon - 6) is produced by the condensation polymerisation of caprolactum at 240-280°C in which the conversion of caprolactum is about __________ percent. |
| A. | 50 |
| B. | 75 |
| C. | 90 |
| D. | 99 |
| Answer» D. 99 | |
| 3. |
Softening point of high density polythene is about __________ °C. |
| A. | 85 |
| B. | 135 |
| C. | 165 |
| D. | 205 |
| Answer» C. 165 | |
| 4. |
Polymerisation product of C 2 F 4 (carbon tetraflouride) is called P.T.F.E. (poly chloro tetra flouro ethylene). It is also called |
| A. | polyurethane |
| B. | silicone rubber |
| C. | teflon |
| D. | epoxy resin |
| Answer» D. epoxy resin | |
| 5. |
Epoxy resin is a polymer containing two or more groups called epoxide group or ethoxyline group. It is a |
| A. | polyamide & an elastomer. |
| B. | good adhesive. |
| C. | surface coating agent. |
| D. | both (b) and (c). |
| Answer» E. | |
| 6. |
Condensation polymerisation of caprolac-tum is carried out in the reactor maintained at a temperature of __________ °C for producing nylon-6. |
| A. | -20 to 25 |
| B. | 50 to 75 |
| C. | 100 to 150 |
| D. | 250-280 |
| Answer» E. | |
| 7. |
Which of the following rubbers has the widest service temperature range (-75 to 275°C) ? |
| A. | Butyl rubber |
| B. | Silicon rubber |
| C. | Nitrile rubber |
| D. | Silicone rubber |
| Answer» E. | |
| 8. |
Cellulose acetate has very high film permeability among all the polymers of the order of 5000 gm/100 m 2 . Which of the following polymers has the maximum film elongation (of the order of 100%) ? |
| A. | Water impermeable cellophane |
| B. | Polythene |
| C. | Cellulose acetate |
| D. | Teflon |
| Answer» C. Cellulose acetate | |
| 9. |
Temperature maintained in the emulsion polymerisation reactor for PVC manufacture is about __________ ° C. |
| A. | -20 |
| B. | 50 |
| C. | 250 |
| D. | 500 |
| Answer» C. 250 | |
| 10. |
Most of the plastics are safe to be used upto a maximum temperature of __________ °C. |
| A. | 100 |
| B. | 150 |
| C. | 350 |
| D. | 450 |
| Answer» C. 350 | |
| 11. |
Zeigler - Natta catalyst (AlR 3 - AlCl 3 ) is used in the polymerisation of |
| A. | vinyl acetate |
| B. | vinyl chloride |
| C. | propylene |
| D. | styrene |
| Answer» D. styrene | |
| 12. |
Which of the following low molecular weight (<10 4 ), soft & waxy polymer is used in chewing gum ? |
| A. | Cellulose acetate |
| B. | Polyvinyl acetate |
| C. | Thiokol |
| D. | PVC |
| Answer» C. Thiokol | |
| 13. |
90% of the caprolactum is converted to nylon-6 on its condensation polymerisation in the reactor maintained at a temperature of __________ °C. |
| A. | -5 |
| B. | 10-30 |
| C. | 250-280 |
| D. | 500-600 |
| Answer» D. 500-600 | |