MEDIUM
8th CBSE
IMPORTANT
Earn 100

How are polymers classified? What are the raw materials used to manufacture synthetic polymers?

Important Questions on Synthetic Materials

HARD
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 5 - Synthetic Materials>Exercises>Q C
Mention three advantages and three disadvantages of synthetic fibres in comparison to natural fibres.
HARD
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 5 - Synthetic Materials>Exercises>Q C
Describe how you would compare the tensile strengths of threads of different materials.
EASY
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 5 - Synthetic Materials>Exercises>Q D
_____fibres compete with wool.
EASY
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 5 - Synthetic Materials>Exercises>Q D
Polythene carry bags _____ drains and sewers.
EASY
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 5 - Synthetic Materials>Exercises>Q D
Plastics are generally _____ (biodegradable/ non-biodegradable) i.e., they are not environmentally broken down to simpler, harmless substances.
EASY
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 5 - Synthetic Materials>Exercises>Q D
On being burnt, plastics give _____ gases. (toxic / innocuous / safe)
EASY
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 5 - Synthetic Materials>Exercises>Q D
Nylon has _____ tensile strength than cotton. (lower / higher)
EASY
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 5 - Synthetic Materials>Exercises>Q D
On being heated, polyester and nylon _____ before they burn.