NCERT Class VIII Science Solution: Chapter 3-Synthetics Fibres and Plastics Part 1

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Question 1:

Pick the synthetic fibre out of the following?

  1. Cotton

  2. Nylon

  3. Jute

  4. Wool

Answer: B

Question 2:

Which of the following is a source of rayon?

  1. Wool

  2. PET

  3. Wood pulp

  4. Silk

Answer: C

Question 3:

Polycot is obtained by mixing

  1. Nylon and wool

  2. Polyester and wool

  3. Nylon and cotton

  4. Polyester and cotton

Answer: D

Question 4:

Which is a thermosetting plastic?

  1. Melamine

  2. Polythene

  3. PVC

  4. Nylon

Answer: A

Image of thermosetting plastics

Thermosetting Plastics

Question 5:

The material similar to silk in appearance is

  1. Nylon

  2. Rayon

  3. Polyester

  4. Terylene

Answer: B

Question 6:

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

  1. Polythene

  2. PVC

  3. Nylon

  4. Bakelite

Answer: D

Question 7:

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

  1. Non-reactive

  2. Light in weight

  3. Durable

  4. Good conductor of electricity

Answer: D

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