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प्रश्न
Which of the following is a natural polymer ? Buna-S, Proteins, PVC
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उत्तर
The given three polymers are Buna-S, Protiens, PVC.
Among these three polymers, proteins are the natural polymers. They are the long chain of amino acids joined by peptide linkages. Buna-S and PVC are synthetic polymers.
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संबंधित प्रश्न
Write the free radical mechanism for the polymerisation of ethene.
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Why should the monomers used in addition polymerisation through free radical pathway be very pure?
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.
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The Ziegler Natta catalyst are
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\[\ce{X + C + Cl2 ->[High temperature][of about 1000 K] Y + CO}\];
\[\ce{Y + 2H2O -> Z + 2HCl}\]
Compound Y is found in polymeric chain structure and is an electron-deficient Molecule. Y must be:
Which of the following statements about low density polythene is false?
