MCQOPTIONS
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MCQOPTIONS
This section includes 10 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. |
Bakelite is ____________ |
| A. | Gel |
| B. | Gas |
| C. | Solid |
| D. | Liquid |
| Answer» D. Liquid | |
| 2. |
Emeraldine base form of polyaniline is used as a resist for lithography. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
Which of the following is not an application of conducting polymers? |
| A. | Rechargeable batteries |
| B. | Analytical sensors |
| C. | Electronics |
| D. | Adhesives |
| Answer» E. | |
| 4. |
Which of the following is not true for intrinsically conducting polymers? |
| A. | Low conductivities |
| B. | Poor mechanical strength |
| C. | Improcessability |
| D. | Good storage stability |
| Answer» E. | |
| 5. |
The final washings of the salt is done with ____________ |
| A. | Distilled water |
| B. | Diethyl ether |
| C. | Methanol |
| D. | Acetone |
| Answer» C. Methanol | |
| 6. |
The color of emeraldine salt which is obtained is ____________ |
| A. | Copper tint |
| B. | Blue green |
| C. | Green |
| D. | Light blue |
| Answer» D. Light blue | |
| 7. |
The precipitate is dried under vacuum at 60-80 0C for ____________ |
| A. | 1 hour |
| B. | 2 hours |
| C. | 5 hours |
| D. | 8 hours |
| Answer» E. | |
| 8. |
During the polymerisation of polyaniline, the sequence of the colour change is ____________ |
| A. | Green >> copper tint >> blue green >> light blue |
| B. | Light blue >> blue green >> copper tint >> green |
| C. | Copper tint >> blue green >> green >> light blue |
| D. | Blue green >> green >> light blue >> copper tint |
| Answer» C. Copper tint >> blue green >> green >> light blue | |
| 9. |
The advantage of using conducting polymers in place metals is their ____________ |
| A. | Cost |
| B. | Light-weight |
| C. | Thermal conductivity |
| D. | Solubility |
| Answer» C. Thermal conductivity | |
| 10. |
Which of the following is used for making rechargeable batteries? |
| A. | Polypyrrole |
| B. | Polyester |
| C. | Polyaniline |
| D. | Polyacrylonitrile |
| Answer» D. Polyacrylonitrile | |