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Synthetic Fibres and plastics

Total questions: 16

Worksheet time: 8mins

Name
Class
Date
1.

A chain of small chemical units combined to form a large single unit is called ____

a)

a) Polymer

b)

b) Poly

2.

Which of the following have more tensile strength ?

a)

silk

b)

nylon

c)

rayon

d)

spandex

3.

_________ is the first fully synthetic fibre.

a)

Acrylic

b)

Polyester

c)

Nylon

d)

Rayon

4.

Fibres of _______ resemble that of silk and hence, it is popularly known as ‘artificial silk’.

a)

acrylic

b)

polyester

c)

rayon

d)

nylon

5.

Necklace : bead :: polymer : ________.

a)

Monomer

b)

Dimer

c)

Tetramer

d)

Trimer

6.

Main source of raw material for producing synthetic fibre is :

a)

CNG

b)

LPG

c)

Refined oil.

d)

Petroleum

7.

A large single unit combined by many small units

a)

Polyester

b)

Polymer

c)

Terrycot

d)

Polywool

8.

Where was silk fibre discovered?

a)

France

b)

Germany

c)

India

d)

China

9.
Jute is
a)
a man made fibre
b)
an animal fibre
c)
it melts on heating
d)
it is a plant fibre
10.

polymers are made up of small units called

a)

layers

b)

molecules

c)

cells

d)

monomers

11.

______________ are the chemicals which give fruits their smell.

a)

fructose

b)

lactose

c)

esters

12.

PET is a _________

a)

(a) polyester

b)

b) polyamer

c)

(c) nylon

d)

(d) thermosetting polymer

13.

Polycot is made by mixing two types of fibres namely

a)

Silk + Cotton

b)

Polythene + cotton

c)

Silk + Polyester

d)

Polyester + Cotton

14.

_____________ is an example of natural polymer

a)

Rayon

b)

Cellulose

c)

Nylon

d)

All of the above

15.

Polywool is a mixture of polyester and

a)

cotton

b)

silk

c)

wool

d)

rayon

16.

We wear sweaters and use shawls or blankets in the winter. Many of these are actually not made from natural wool, though they appear to resemble wool. These are prepared from another type of synthetic fibre called

a)

acrylic

b)

nylon

c)

polyester

d)

rayon