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प्रश्न
Match the polymer of column I with correct monomer of column II.
| Column I | Column II |
| (i) High density polythene | (a) Isoprene |
| (ii) Neoprene | (b) Tetrafluoroethene |
| (iii) Natural rubber | (c) Chloroprene |
| (iv) Teflon | (d) Acrylonitrile |
| (v) Acrilan | (e) Ethene |
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उत्तर
| Column I | Column II |
| (i) High density polythene | (e) Ethene |
| (ii) Neoprene | (c) Chloroprene |
| (iii) Natural rubber | (a) Isoprene |
| (iv) Teflon | (b) Tetrafluoroethene |
| (v) Acrilan | (d) Acrylonitrile |
Explanation:
| Column I | Column II |
| (i) High density polythene | It is formed when addition polymerisation of ethene takes place in a hydrocarbon solvent in the presence of a catalyst. |
| (ii) Neoprene | Neoprene or polychloroprene is formed by the free radical polymerisation of chloroprene. |
| (iii) Natural rubber | Natural rubber may be considered as a linear polymer of isoprene (2-methyl-1, 3-butadiene). |
| (iv) Teflon | Teflon is manufactured by heating tetrafluoroethene with a free radical or persulphate catalyst at high pressures. |
| (v) Acrilan | The addition polymerisation of acrylonitrile in pressure of a peroxide catalyst leads to the formation of polyacrylonitrile. |
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संबंधित प्रश्न
How are polythene and neoprene prepared?
What is the role of t-butyl peroxide in the polymerization of ethene?
Write the mechanism of free radical polymerization of ethene.
Which of the following is a natural polymer ? Buna-S, Proteins, PVC
Write chemical reaction to prepare the Dextron polymer:
Dextron
Which of the following statements is not true about low-density polythene?
Out of chain growth polymerisation and step growth polymerisation, in which type will you place the following.
What is the role of benzoyl peroxide in addition polymerisation of alkenes? Explain its mode of action with the help of an example.
Why should the monomers used in addition polymerisation through free radical pathway be very pure?
Match the polymers given in Column I with their chemical names given in Column II.
| Column I | Column II |
| (i) Nylon 6 | (a) Polyvinyl chloride |
| (ii) PVC | (b) Polyacrylonitrile |
| (iii) Acrilan | (c) Polycaprolactum |
| (iv) Natural rubber | (d) Low-density polythene |
| (v) LDP | (e) cis-polyisoprene |
Match the polymers given in Column I with the preferred mode of polymerisation followed by their monomers.
| Column I | Column II |
| (i) Nylon-6,6 | (a) Free radical polymerisation |
| (ii) PVC | (b) Ziegler-Natta polymerisation or coordination polymerisation |
| (iii) HDP | (c) Anionic polymerisation |
| (d) Condensation polymerisation |
Assertion: Olefinic monomers undergo addition polymerisation.
Reason: Polymerisation of vinyl chloride is initiated by peroxides/ persulphates.
Assertion: Polytetrafluoroethene is used in making non-stick cookwares.
Reason: Fluorine has highest electronegativity.
Low density polythene and high density polythene, both are polymers of ethene but there is marked difference in their properties. Explain.
Which one of the following polymers is prepared by addition polymerisation?
Which of the following statements about low density polythene is false?
