Synthetic Fibres & Plastics

Synthetic Fibres and Plastics Worksheet-1

1. Fabrics which are sold in the commercial markets by names such as polycot, polywool, terrycot are all forms of

(a) Thermoplastics                      (b) Polyesters

(c) PVC                                          (d) Thermosetting Polymers

2. There is always a need to be cautious while burning crackers during diwali. It is always advisable to avoid polyester clothing when burning crackers because

(a) Polyesters are costly and rarely procured.

(b) Polyesters are explosive in nature.

(c) During a fire polyesters melt and stick to the body causing serious burns.

Synthetic Fibres and Plastics Worksheet-2

1. Wood pulp is the source of artificial silk also known as

(a) Teflon           (b) Nylon           (c) Rayon           (d) Terrycot

2. Artificial (man made) wool is known by the name of

(a) Rayon           (b) Acrylic         (c) Polycot         (d) none of these

3. To which of the following 4R principle apply most i.e. reduce, reuse, recycle and recover

(a) Synthetic fibre                        (b) Natural fibre

Synthetic Fibres and Plastics Worksheet-3

1. Cotton which is a cellulosic fibre is highly inflammable. It burns to produce a mixture of water and

(a) N0₂               (b) CO                (c) N0                 (d) CO₂

2. Teflon finds its application in the Chemical Industry in various Laboratories all around the World. This is because of the property of

(a) High heat resistance and non reactivity.

(b) High reactivity

(c) High conductivity

(d) High tensile strength