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Vulcanization: Vulcanization is very widely used in rubber technology to improve the properties such as low tensile strength, plastic nature, thickness etc. by adding some chemicals like sulphur, hydrogen sulphide, benzene chloride etc. it is done by heating of raw rubber with sulphur at 100: 140 degree centigrade temperature. The added sulphur combines chemically as the double bonds of different rubber springs. Sulphur can also bring about vulcanization without affecting the double bonds in the polymer molecule, by eliminating H2S. The rate of vulcanization of rubber is quite slow and also depends upon the types and quality of rubber used. But, by using certain organic compounds called accelerators, vulcanization reaction speed up.
determination of transport number by hittorfs method.
Q. Describe about tetrahalides? S, Se, Te and Po form tetrahalides with all the halogens. However, tetrafluoride of polonium, tetrabromide of sulphur and tetraiodides of sulphu
classification of organic chemistry
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interconversion of phenol to meta-bromo phenol
how to determine the strength ofpotassium dichromate withFAS and N-phenyl anthranilic acid as an internal indicator
What is dielectric strength Dielectric strength- It's the maximum voltage/field gradient (voltage per unit thickness) which the dielectric can withstand without failure/brea
lithium and beryllium markedly differ from other members of their respective groups.
Formic acid is a weak acid along with a pKa of 3.75. Name of this comes through the Latin term "formica" ("ant") since it is extremely plentiful into the secretions of several spec
i want some 25 exampels of nomenculature of complex coordination compounds
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