Assertion : 2-Methyl-1, 3-butadiene is the monomer of natural rubber.

Reason : Natural rubber is formed through anionic addition polymerisation. 

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.

The example of condensation polymerisation is :

• formaldehyde - metaformaldehyde

• acetaldenyde - para acetaldehyde

• acetone - mesityl oxide

• ethene - polyethene

Monomers of nylon 2-nylon 6 are

• glycine and amino caproic acid

• glycine and caproic acid

• hexamethylene diamine and adipic acid

• alanine and amino caproic acid.

The polymer obtained by the interaction of ethylene glycol and terephthalic acid is

• nylon

• dacron

• teflon

• bakelite

Assertion : Orlon is used as a synthetic fibre.

Reason : The monomer of orion is vinyl chloride

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

Assertion : Teflon is chemically inert substance.

Reason : Chloroform when treated with antimony trifluoride gives teflon.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false

• If both assertion and reason are false.

Assertion: Natural rubber is a polymer of isoprene.

Reason: Isoprene is a pentene.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

178.

Which of the following is a polyamide ?

• Bakelite

• Terylene

• Nylon - 66

• Teflon

Select the statement which is not true ?

• Nylon fibres are elastic .

• Nylon fibres are not crease resistant .

• Nylon fibres are used in parachute .

• Both (b) and (c) .

Natural rubber is a polymer of :

• cis-isoprene

• trans-isoprene

• co-cis and trans isoprene

• None of the above