Question

10 riddles on plastic and fibre​

Answer 1

Answer:

Choose the correct option:

1.  Fabric is made of

      (a)  steel(b)  fibre(c)  paper(d)  none of these.

2.  The small units used in making synthetic fibres are.

      (a)  molecules(b)  polymers(c)  cells(d)  none of these.

3.  The strongest fibre is called:

      (a)  rayon(b)  nylon(c)  acrylic(d)  none of these.

4.  The first man-made fibre is

      (a)  nylon(b)  polyester(c)  rayon(d)  cotton.

5.  The plastics which do not remould again on heating are called:

      (a)  thermosetting plastics(b)  thermoplast plastics       (c)  both of these(d)  none of these.

6.  The polyester is made up of

      (a)  Nylon(b)  Rayon(c)  Esters(d)  Cotton.

7.  The nylon is prepared first in

      (a)  1921(b)  1931(c)  1941(d)  1951.

8.  The fibre made up by the chemical treatment of wood pulp is

      (a)  Rayon(b)  Nylon(c)  Polyester(d)  None of these.

9.  A synthetic fibre which works like wool.

      (a)  Nylon(b)  Polyester(c)  Acrylic(d)  PVC.

10.  The raw materials used in making nylon

      (a)  Wood pulp(b)  Cellulose(c)  Coal, water, air(d)  All of these