Advertisements
Advertisements
प्रश्न
PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. Can you write the major difference between these two types of plastics?
Advertisements
उत्तर
Thermoplastics get deformed easily on heating and can be bent easily on heating. On the other hand, thermosetting plastics when moulded once cannot be softened on heating.
Thermoplastics → Polythene and PVC
Thermosetting plastics → Bakelite and melamine
APPEARS IN
संबंधित प्रश्न
Explain why plastic containers are favoured for storing food.
Motor cars are coated with ______.
Write the natural or manmade raw material of the following items.
Mattress, glass vessel, bangle, chair, gunny bag, broom, knife, pen.
How the plastic is produced?
Explain the effect of following materials on environment and human health.
1. Plastic
2. Glass
3.Thermocol.
Can you replace the following packaging material with those which can be recycled or reused.
Gift items packed with shiny material.
Can you replace the following packaging material with those which can be recycled or reused.
Glass tumblers packed in thermocol box.
What are the demerits of plastic?
A plastic used for making crockery is ______.
Most one-time-use plates are made from ______.
