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Which of the following statements is/ar...

Which of the following statements is/are not correct ?

A

High pressure polymerisation of ethylene in the presence of a free radical initiator gives highly branched polymer

B

The density of high pressure polymerised ethylene is more than that of low pressure polymerised ethylene

C

Polymerisation of ethylene at low temperature and pressure results into a linear polymer with much less branched chains

D

Low pressure polymerisation of ethylene can be done at a lower temperature using a Ziegler catalyst

Text Solution

Verified by Experts

The correct Answer is:
B
Density of high pressure polymerised ethylene (LDPE, 200 atm. pressure ) is less than that of low pressure (6-7 atm ) polymerised ethylene (HDPE).
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-POLYMERS-EXERCISE 2
  1. What is the common monomer for buna-S and buna-N rubber ?

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  2. The polymer used in making synthetic hair wigs is made up of

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  3. Which of the following statements is/are not correct ?

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  4. Head-to-tail addition take palce in chain-growth polymerisation when m...

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  5. Which of the following structures represents neoprene polymer?

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  6. HDPE,PVC, nylons are the example of

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  7. Lactam from which nylon-4 is synthesised is

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  8. Which of the following is currently used as a tyre cord?

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  9. Identify the examples of thermoplastic polymers .

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  10. The best way to prepare polyisobutylene is

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  11. Which of the following polymers of glucose is stored by animals?

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  12. Bakelite is a condensation polymer of phenol and formaldehyde . The i...

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  13. Interparticle forces present in nylon-66 are:

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  14. Which of the following dose not come under the classification of poly...

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  15. Among the following , the wrong statement is

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  16. Match the following and choose the correct option from the codes give...

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  17. Which of the following polymers does not involve cross-linkages ?

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  18. Which is true for terpolymers ?

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  19. What is [--CH(2)-CH-(C(6)H(5))--](n) ?

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  20. The monomer of the following polymer are

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