Available Answers

1. 1.

   Choose and write the correct answer (MCQs) :

   1. Which of the following is copolymer :
      1. Buna-S
      2. PVC
      3. orlon
      4. neoprene
   2. Polymers are :
      1. micro-molecules 
      2. macro-molecules 
      3. sub-micromolecule
      4. none of these
   3. Terylene is the example of synthetic :
      1. rubber
      2. plastic 
      3. fibre
      4. none of these
   4. The monomer of PVC is :
      1. poly styrene 
      2. PAN 
      3. neoprene 
      4. poly vinyl chloride 
   5. Natural rubber is a polymer of :
      1. butadiene
      2. ethylene 
      3. styrene 
      4. isoprene
   6. Bakelite is used for making :
      1. parachute 
      2. telephone sets
      3. rubber
      4. waterproof fabric
2. 2.

   Fill in the blanks :

   1. Teflon is used as a coating on the surface of cooking utensils due to its ___________ properties.
   2. Nylone fibre is used for making reinforced ___________ tyres.
   3. Artificial fibre have lustre, they do not ____________ on washing.
   4. The rayon is obtained from ______________ solution by passing it through a spinneret.
   5. The copolymer of Buna-S rubber is ___________.
   6. Nylon fibre has high ____________ strength.
3. 3.

   Write T for true or F for false :

   1. The plastic used for making insulator electric wire is teflon.
   2. Cotton fibres are good absorbers of sweat.
   3. Poly vinyl chloride is made by polymerization of ethene.
   4. The plastic used for water proofing cotton fabric is koroseal.
   5. The raw material for making rayon is vinyl chloride.
4. 4.

   Match the column A with column B :

   A	B
   1. Cellulose	a. Parachute
   2. Malamine	b. Rubber
   3. Bune-S	c. Plastic
   4. Nylone	d. Natural fibre
   5. Ethylene glycol and terephthalic acid	e. Terylene

    

5. 5.

   What do you understand by polymer?

6. 6.

   Define thermosetting plastic.