Pick the synthetic fibre out of the following.

1

(a)

Cotton

(b)

Nylon

(c)

Jute

(d)

Wool

Which of the following is a source of rayon?

1

(a)

Wool

(b)

PET

(c)

Wood pulp

(d)

Silk

Polycot is obtained by mixing

1

(a)

nylon and wool

(b)

polyester and wool

(c)

nylon and cotton

(d)

polyester and cotton

The most suitable material for the preparation of handles of cooking utensils is

1

(a)

polythene

(b)

PVC

(c)

nylon

(d)

bakelite

Which of the following is not a common property of plastics?

1

(a)

Non-reactive

(b)

Light in weight

(c)

Durable

(d)

Good conductor of electricity

Rayon is obtained by:

1

(a)

Petroleum products

(b)

fully synthetic method

(c)

chemical treatment of wood pulp

(d)

all methods

Which is not made from nylon?

1

(a)

socks

(b)

rope

(c)

bottles

(d)

tents

The strongest fibre is called:

1

(a)

rayon

(b)

nylon

(c)

acrylic

(d)

none of these

The polyester is made up of:

1

(a)

nylon

(b)

rayon

(c)

esters

(d)

cotton.

A fibre similar to wool is.........

1

(a)

acrylic

A plastic used for making crockery is.........

1

(a)

melamine

Plastics are............ conductors of heat

1

(a)

poor

A nylon wire is............ than steel wire

1

(a)

stronger

Peels of vegetables and fruits are......

1

(a)

biodegradable

The fibres that are made by human beings, are called _______ or _______ fibres.

1

(a)

synthetic, man-made

_________ is quite suitable for making dress material.

1

(a)

Terylene

__________ and ________ are some of the examples of thermoplastics.

1

(a)

Polythene, PVC

Plastic does not react with ________ and ________.

1

(a)

moisture, air

Plastic _________ is a substance since it takes several years to decompose.

1

(a)

non-biodegradable

It is not advised to store food items in plastic containers as it reacts with the material of the container

1

(a) True

(b) False

Polyester is a man-made fibre

1

(a) False

(b) True

Plastics are environment friendly.

1

(a) True

(b) False

The fabric terry wool is obtained by mixing Terylene and wool.

1

(a) False

(b) True

A synthetic fibre is a chemical substance of single unit.

1

(a) True

(b) False