Lakhmir Singh and Manjit Kaur Solutions for Chapter: Synthetic Fibres and Plastics, Exercise 5: Questions Based on High Order Thinking Skills (HOTS)

Author:Lakhmir Singh & Manjit Kaur

Lakhmir Singh Science Solutions for Exercise - Lakhmir Singh and Manjit Kaur Solutions for Chapter: Synthetic Fibres and Plastics, Exercise 5: Questions Based on High Order Thinking Skills (HOTS)

Attempt the free practice questions on Chapter 3: Synthetic Fibres and Plastics, Exercise 5: Questions Based on High Order Thinking Skills (HOTS) with hints and solutions to strengthen your understanding. Lakhmir Singh's SCIENCE FOR CLASS 8 solutions are prepared by Experienced Embibe Experts.

Questions from Lakhmir Singh and Manjit Kaur Solutions for Chapter: Synthetic Fibres and Plastics, Exercise 5: Questions Based on High Order Thinking Skills (HOTS) with Hints & Solutions

MEDIUM
8th CBSE
IMPORTANT

Which plastic(write the full name) is used for making flexible water bottles? (polyvinyl chloride / Poly-Ethylene Terephthalate)

MEDIUM
8th CBSE
IMPORTANT

Which of the following articles made of plastics ‘can be recycled’ and which ‘cannot be recycled’? Give reasons for your choice.
Telephone instruments, Plastic toys, Cooker handles, Plastic covering on electrical wires, Electric switches, Ballpoint pens, Carry bags, Plastic bottles, Plastic chairs.
 

MEDIUM
8th CBSE
IMPORTANT

Out of the following materials:

Cotton, Nylon, Terylene, Wool, PET, Acrylic 

Which materials are polyesters?

MEDIUM
8th CBSE
IMPORTANT

Out of the following materials:

Cotton, Nylon, Terylene, Wool, PET, Acrylic 

Which material is a polyamide?

MEDIUM
8th CBSE
IMPORTANT

Out of the following materials:

Cotton, Nylon, Terylene, Wool, PET, Acrylic 

Which material is used as a substitute for wool?

MEDIUM
8th CBSE
IMPORTANT

Out of the following materials:

Cotton, Nylon, Terylene, Wool, PET, Acrylic 

Which material is used as a substitute for glass?

HARD
8th CBSE
IMPORTANT

The synthetic fibre A is chemically a polyamide whereas the synthetic fibre B contains a large number of ester groups. Another synthetic fibre C is made of a polymer D which consists of a number of glucose units joined one after the other.
(a) Which fibre could be (i) terylene (ii) rayon, and (iii) nylon?
(b) Name the polymer D.
(c) Which fibre (A, B, or C) is prepared from a natural raw material?
(d) Which fibre (A, B or C) contains the same type of groups as those in a PET jar?