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प्रश्न
Which is a thermosetting plastic?
विकल्प
Melamine
Polythene
PVC
Nylon
उत्तर
Melamine
Explanation -
Melamine is a thermosetting plastic which when moulded once, cannot be softened by heating.
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संबंधित प्रश्न
Fill in the blanks with appropriate words.
Like synthetic fibres, plastic is also a _______
Can you replace the following packaging material with those which can be recycled or reused.
Dry eatables in polythene.
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.
Why is it better to avoid the use of plastic products?
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?
Most one-time-use plates are made from ______.
Pet name for Buckminster Fullerene is ______.
Assertion (A): PVC is an unsafe plastic.
Reason (R): Burning PVC releases dioxins, a most toxic chemical.
Answer the following by rearranging the jumbled letters :
One-time use plastics are also known as ______ plastics.
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