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Classification of polymers - Thermoplastics
These are the polymers that can be simply softened repeatedly while heated and hardened when cooled along with little change in their characteristics. The intermolecular forces in these types of polymers are intermediate among those of fibres and elastomers. There is no cross binding among the chain. The softening occurs like the polymer chain go much more and more freely due to not presence of cross link. While heated, they make a fluid which can be moulded into any desired shapes and after that cooled to get the desired product and melt
Factor of affecting conductions
#vescosity and viscosity index
Q. Determine the Number of neutrons? Isotopes of an element can as well be specified by writing the mass number of the isotope following a hyphen after the name of the element.
Rice bran Rice bran contains primarily insoluble fiber (cellulose) and soluble fiber (hemicellulose). Insoluble fiber adds bulk to the gastrointestinal (GI) track in humans cau
If wavelength of photon is 2.2x10 -11 m, h= 6.6x 10 -34 J-sec, then momentum of photon is: (1) 3x 10 -23 kgms -1 (2) 3.33x 10 22 kgms -1 (3) 1.452x 10-
Q. Quantum Mechanical Model of the Atom? Ans: Using quantum mechanics, scientists realized that the exact location of an electron could not be determined. Instead, only the p
Compound A has the molecular formula C 4 H 8 O 2 . Figure 1 gives the infrared spectra of compound A. Table gives the chemical shifts and multiplicity data of the broad-ban
Q. Show the Occurrence of Metals? Earth's crust and sea are the two main sources of metals. In the earth's crust metals occur both in the combined state in the form of minerals
Reaction due to ethernal oxygen (a) The boiling point of peroxide is higher as compared to that of ether. It is not present as remains in the distillation of ether and may reas
Addition of Grignard reagents: Grignard reagents react along with carbonyl compounds to offer alcohols. Nature of alcohol lies on the nature of carbonyl compound. Addition o
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