Write the monomers used for getting the following polymers. (i) Polyvinyl chloride (ii) Teflon (iii) Bakelite
1) Polyvinyl chloride (PVC) - The monomeric unit present is vinyl chloride (CH2 =CH –Cl). PVC is used in the manufacture of rain coats, curtain cloths, hand bags, toys, artificial flooring, gramophone records and as a good insulating material in wires and other electrical goods.
2) Teflon (PTFE) - The monomeric unit present is tetrafluoroethene (n F2C = CF2). Teflon is used as a material resistant to heat and chemical attack. It is also used for making gaskets, pump packings, valves, oil seals, non -lubricated bearings.
3) Bakelite - The monomeric unit present is formaldehyde (HCHO) and phenol (C6H5OH). Bakelite is used for making glue for binding laminated wooden planks and in varnishes, combs, fountain pens, electrical switches.
The reaction between A and B is first order with respect to A and zero order with respect to B. Fill in the blanks in the following table:
| Experiment |
A/ mol L - 1 |
B/ mol L - 1 |
Initial rate/mol L - 1 min - 1 |
| I | 0.1 | 0.1 |
2.0 × 10 - 2 |
| II | -- | 0.2 |
4.0 × 10 - 2 |
| III | 0.4 | 0.4 | -- |
| IV | -- | 0.2 |
2.0 × 10 - 2 |
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1) Polyvinyl chloride (PVC) - The monomeric unit present is vinyl chloride (CH2 =CH –Cl). PVC is used in the manufacture of rain coats, curtain cloths, hand bags, toys, artificial flooring, gramophone records and a...
Step-by-step explanation:
• 1) Polyvinyl chloride (PVC) - The monomeric unit present is vinyl chloride (CH2 =CH –Cl)
• PVC is used in the manufacture of rain coats, curtain cloths, hand bags, toys, artificial flooring, gramophone records and as a good insulating material in wires and other electrical goods
•
•
• 2) Teflon (PTFE) - The monomeric unit present is tetrafluoroethene (n F2C = CF2)
Students often lose marks by skipping steps, writing incomplete explanations, or misunderstanding keywords used in the question.
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