Tag: polymers

Questions Related to polymers

'Koroseal' is a long, chain polymer. When mixed with plasticizers, it forms an excellent plastic. Which one of the following is not the use of it?

classification of polymers introduction to polymers and its classification polymer polymers chemistry

  1. For water-proofing

  2. Lining material for tanks

  3. In wire and cable insulation

  4. For sun-shading

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Correct Option: D
Explanation:

Koreseal is a long chain polymer of vinyl chloride $(CH _2CHCl)$.

Vinyl polymers are heat, electricity and corrosion resistant and are unaffected by exposure to light or by long storage.
When it is mixed with plasticizers, it is used as wall covering paints for water proofing property; lining material for tanks; also used in wire and cable insulation.

Arrange the following types of polymer in order of decreasing force of attraction.


   Fibres        Elastomer                Thermoplastic
      (I)                 (II)                               (III)

classification of polymers introduction to polymers and its classification polymer polymers chemistry

  1. I > II > III

  2. I > III > II

  3. II > I > III

  4. III > II > I

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Correct Option: B
Explanation:

Fiber have strong intermolecular forces of attraction take H-bonding.


Elastomers have weak fores of attraction which thermoplastic have weakest 
forces like london or dispersion forces / vanderwaal forces.

So order is $(I)>(III)>(II)$

Which monomer would polymerise in isotactic, syndiotactic and atactic forms ?

classification of polymers introduction to polymers and its classification polymer polymers chemistry

  1. $CH _2 = CCl _2$

  2. $CH _3-CH=CH _2$

  3. $Ph-CH=CH _2$

  4. All of the above

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Correct Option: B,C

Which pair of polymers have similar properties?

classification of polymers introduction to polymers and its classification polymer polymers chemistry

  1. Nylon, $PVC$

  2. $PAN, PTFE$

  3. $PCTFE, PTFE$

  4. Bakelite, alkyle resin

Show answer
Correct Option: C
Explanation:

$PCTFE, PTFE$ both have same carbon backbone

  1. $-[ClFC - CF _{2}] _{n}$ $ = PCTFE$ (polymonochloro tetrafluoro ethylene)
  2. $ [F _{2}C - CF _{2}] _{n} = PTFE$ (polytetrafluoro ethylene).