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प्रश्न
Which of the following statements is not true about low-density polythene?
विकल्प
Tough
Hard
Poor conductor of electricity
Highly branched structure
उत्तर
Poor conductor of electricity
Explanation:
Low-density polythene: It is obtained by the polymerisation of ethene under high pressure of 1000 to 2000 atmospheres at a temperature of 350 K to 570 K in the presence of traces of dioxygen or a peroxide initiator (catalyst). They are flexible in nature.
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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?
Which of the following is a natural polymer ? Buna-S, Proteins, PVC
What is the role of benzoyl peroxide in addition polymerisation of alkenes? Explain its mode of action with the help of an example.
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 |
Which one of the following can be used as monomer in a polymerisation reaction?
The Ziegler Natta catalyst are
Which one of the following polymers is prepared by addition polymerisation?
Which of the following statements about low density polythene is false?
