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How is dacron obtained from ethylene glycol and terephthalic acid? - Chemistry

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प्रश्न

How is dacron obtained from ethylene glycol and terephthalic acid?

उत्तर १

The condensation polymerisation of ethylene glycol and terephthalic acid leads to the formation of dacron

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उत्तर २

Dacron is obtained by condensation polymerization of ethylene glycol and terephthalic acid with the elimination of water molecules. The reaction is carried out at 420 – 460 K in presence of a catalyst consisting of a mixture of zinc acetate and antimony trioxide.

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पाठ 15: Polymers - Exercises [पृष्ठ ४३८]

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एनसीईआरटी Chemistry [English] Class 12
पाठ 15 Polymers
Exercises | Q 19 | पृष्ठ ४३८

संबंधित प्रश्‍न

Which of the following is a fibre? Nylon, neoprene, PVC


Write the names of monomers of the following polymers:


How can you differentiate between addition and condensation polymerisation?


Write a note on aldol condensation.


Name the monomers and the type of polymerization in each of the following polymers:

Bakelite


What is the significance of number of 6,6 in the polymer nylon-6,6?


Which of the following polymers can have strong intermolecular forces?

(i) Nylon

(ii) Polystyrene

(iii) Rubber

(iv) Polyesters


Match the polymers given in Column I with their main applications given in Column II.

Column I Column II
(i) Bakelite (a) Unbreakable crockery
(ii) Low-density polythene (b) Non-stick cookwares
(iii) Melamine-formaldehyderesin (c) Packaging material for shock absorbance
(iv) Nylon 6 (d) Electrical switches
(v) Polytetrafluoroethane (e) Squeeze bottles
(vi) Polystyrene (f) Tyre, cords

Assertion: Polyamides are best used as fibres because of high tensile strength.

Reason: Strong intermolecular forces (like hydrogen bonding within polyamides) lead to close packing of chains and increase the crystalline character, hence, provide high tensile strength to polymers


Which of the following polymer is used for making phonograph records?


A raw material used in making nylon is


Perion is 


Nylon is a


Wash and wear clothes are manufactured using


Melamine is


Nylon – 6 is made from


Which is used for the formation of nylon – 6?


The polymer formed on heating Novolac with formaldehyde is ______.


The polymer formed on heating Novolac with formaldehyde is ______.


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