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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.
Uses of Acetylene (a) Acetylene is utilized as an illuminant. (b) It is utilized for the production of oxy-acetylene flame. The high temperature of the flame is above. Is ut
Which one is not the correct relation in the following: (1) h= E/ v (2) E= mc 2 (3) Δ x × p = h/ 4 Π (d) γ
define explosive
Till 20elememts write the no of electrons in outermost shell.if less than 4 then this is the valency otherwise subtract from 8
why carbonate salts are insoluble in water
ACCOUNT FOR THE STABILITY OF CONJUGATED DIENES
Explain the Winnowing and Primary processing of wheat Winnowing: In this process, the impurities are separated on the principle that their density differs from that of the
show me the procedure for the separation of basic radicals
Write an equation that shows the formation of the selenide ion from a neutral selenium atom
respiration. is it a exothermic or endothermic
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