NEET

Dacron is obtained by the condensation polymerisation of:

Which of the following is not an example of addition polymer ?

Ebonite is

Solution

Ebonite is a hard highly vulcanized rubber, containing 20-25%, sulphur.

Which of the following is not polyamide ?

A condensation polymer among the following is

Solution

Polymers which form from condensation polymerisation are called condensation polymers dacron is a condensation polymer of terepthalic acid and ethylene glycol.

Which of the following is an example of thermosetting polymer?

Solution

Bakelite is a thermosetting polymer. On heating it becomes hard and infusible thus cannot be remoulded.

[NH(CH₂)₆NHCO(CH₂)₄CO]_n is a

Solution

The given compound is a copolymer of hexamethylene diamine and adipic acid. It is actually Nylon-66.

Natural rubber is a polymer of

In elastomer, intermolecular forces are

Solution

Elastomers are the polymers having very weak intermolecular forces of attraction between the polymeric chains. The weak forces permit the polymer to be streched.

Which of the following is a polymer containing nitrogen?

Solution

Nylon is a polymer of adipic acid and hexamethylenediamine thus it contains nitrogen.Polyvinyl chloride is a polymer of vinyl chloride.It does not contain nitrogen.
Bakelite is a resin of formaldehyde and phenol. It does not contain nitrogen.
Terylene is a polymer of ethylene glycol and terephthalic acid. It does not contain nitrogen. It is also called dacron.

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