HARD
8th CBSE
IMPORTANT
Earn 100

Describe how you would compare the tensile strengths of threads of different materials.

Important Questions on Synthetic 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.
MEDIUM
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 5 - Synthetic Materials>Exercises>Q E
Which of the following is a natural polymer?
MEDIUM
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 5 - Synthetic Materials>Exercises>Q E
The filament of which kind of synthetic polymer was first obtained that could be stretched several times its original length?