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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.
preparations of hydroquinone
Ammonia is a gas for which reliable analytical methods are available to explain concentration in other gases. To measure ?ow in a 15 inch schedule 40 natural gas pipeline, pure am
With which of the given pairs CO 2 resembles: (1) HgCl 2 , C2H 2 (2) HgCl 2 , SnCl 4 (3) C 2 H 2 , NO 2 (4) N 2 O and NO 2
Q. Illustrate important catalyst of aluminium? Anhydrous AlCl 3 is an important catalyst, used in organic synthesis and in the cracking of petroleum. Al 2 (S0 4 ) 3 as such o
Write a sort note electronic displacements in a covalent bond ?
If a mole were to have 1*10^24 particles what is the weight of one mole of oxygen molecule and 1 molecule of oxygen Ans) Since the gram molecular mass remains the similar...weig
methods for metallurgy
Q. Write phosphate conditioning method for water softening with suitable chemical reactions. How it is different from soda lime method. Ans. Phosphate condition
Plz tell me the units of absorptivity if it has any units
how to express nernst equation by daniel cell? as we have taken mass of subsstance insted of concentration
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