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Thermoplastic: These polymer gets soften on heating and can be converted into any shape that they can retain on cooling. Such polymers that soften on heating and stiffen on cooling are termed as "Thermoplastic".
For examples: Polythene, PVC, nylon, and sealing wax.
Thermosetting: They are like the yolk of egg, which on heating sets into a mass, and once set, cannot be reshaped. Such polymers, which become infusible and insoluble mass on heating, are called "Thermosetting" polymers. E.g. Bakelite.
which of the following is not a characteristic of plunck''s quantum theory of radiation? A) Radiation are associated with energy B) A body can emit less or more than a quantum of e
Nuclei tend to have more neutrons than protons at high mass numbers because: (1) Neutrons are neutral particles (2) Neutrons have more mass than protons (3) More neut
WHAT CAUSES WIND
how is hydrogen peroxide storage in equatorial places (phil)? should it require 2-8 deg C? or ambient room? any special cabinets or equipment sof storing?
240 g of water at 20 degree C are mixed with a sample of iron at 500 degree C. The final temperature of the system is 42 degree C. Find the mass of the iron sample
what are the chemical poperties of p-block elements ?
Hello Dear, my assignment is that I have to write ESSAY 5 pages to 6 pages in Biochemistry calss about technique. after you read the chapter ( the Chapter as attachment) you figure
NaOH + K2Cr2O7 ---> HCo + NaHCO3 ---> HCo + NaOH ---> CuSo4 + NaOH ---> CH3COOH + NaHCO3 ---> PbNO3 + KI --->
Ask question #The first-order rate constant for the decomposition of dimethyl ether is 3.2 ? 10 -4 s -1 at 450 o C. The reaction is carried in a constant volume flask. Initially on
Q. What are boiler troubles? Discuss their consequences? Sol. Boiler feed water (water for steam making): water is very important engineering material which is mainly used fo
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