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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.
esters IR Spectrum
what is the difference between molarity and normality
The standard EMF of Pt/H2(g)/HCl(aq)//AgCl(aq)/Ag has been experimentally determined from 0-90?C to yield the following; E?/V =0.23659 – 4.856 * 10-4t(?C) – 3.4205 * 10-4t2(?C) +
procedure and curves for radiometric titration
the value of charge on the oil droplets experimentally observed were -1.6*10-19 and -4*10-19coulomb. the value of the electronic charge,indicated by these results is
Q. Define standard reduction potential ? Ans. The standard reduction potential, E o As we have seen in the example of a chemical cell in the previous section, the redox rea
what is tyndall effecet? can you give an example
Iodoform or tri-iodomethane, CHI 3 Industrial preparation Iodoform is ready on large scale by electrolysis of a solution consisting of ethanol, potassium iodide and sodium
For azimuthal quantum number l= 3 , the maximum number of electrons will be: (1) 2 (2) 6 (3) 0 (4) 14 Ans: 14
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?
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