The main constituents of plastics are
Pick up the wrong statement:
There occurs an increase in softness, flexibility and ease in processing of plastics with the addition of
There occurs an increase in softness, flexibility and ease in processing of plastics with the addition of (a) fillers (b) catalysts (c) plasticizers (d) asbestos
Select the true statements among the following:
Thermosetting plastics are
1. Formed by addition polymerisation
2. Formed by condensation polymerisation
3. Softened on heating and hardened on cooling for any number of times
4. Moulded by heating and cooling
The chemical name of Bakelite is
The chemical name of teflon is
Teflon is a thermoplastic polymer. Its chemical name is polytetra fluoroethylene. It finds applications in nonlubricating bearings, because of its very low coefficient of friction.
Which of the following polymers produces HCI as condensate?
The main polycarbonate material is produced by the reaction of bisphenol A(BPA) and phosgene CO CI2 HCI is final by product.
The natural fibres are made from simple molecule that is known as
The fibres which resemble wool are known as
We wear sweaters and use shawls or blankets in the winter. Many of these are actually not made from natural wool, though they appear to resemble wool. These are prepared from another type of synthetic fibre called acrylic. They are available in range of colors.
Consider the following types of waste:
1. Cotton cloth
2. Woollen clothes
3. Metal parts
4. Plastic bags
Q. Which of the above are non-biodegradable?