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a. How does vulcanization change the character of natural rubber?
b. Why are the numbers 66 and 6 put in the names of nylon-66 and nylon-6?
What is the packet of energy called: (1) Electron (2) Photon (3) Positron (4)Proton Ans: Photon
How we get 49 gm = 1 eqv
In a Bohr's model of atom when an electron jumps from n= 1 to n= 3 , how much energy will be emitted or absorbed: (1) 2.15 x10 -11 erg (2) 0.19
why is carbon valency four
Q. Illustrate Born-Haber cycle? Boron is always covalent and does not form,B 3+ ions, because' the energy required to remove three electrons is very high. Many simple compo
Which monomers can undergo free radical, cationic as well as anionic polymerisation with equal ease? CH2=CH2
Gold has a molar mass of 197g/mol. How many atoms are in the sample?Please give me procedure also. Ans) molecular wieght of gold is 197 g 1mole/g of molecule is occupies t
Born Haber cycle with example as sodium chloride
In the anaerobic fermentation of grain the yeast Saccharomyces cerevisiae digests glucose from plants to form the products ethanol and propenoic acid by the following overall react
What is T in the indicator Eriochrome Black-T used for the determination of hardness of water?
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