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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.
Define the Elements of a galvanic cell? We will treat a galvanic cell as a system. The cell has two metal wires called terminals that pass through the system boundary. Within t
how many mole ratios can be obtained from the following equation? Na2S+Cd(NO3)2-2NaNo3+CdS
Define Advancement and charge - Cell Diagrams? The electron number or charge number, z, of the cell reaction is defined as the amount of electrons entering at the right termina
i) Electrophillic substitution in case of aromatic amines takes place more readily than benzene. ii) Nitro compounds have higher boiling points than hydrocarbons having almost s
Artificial process for manufacture of Petrol or gasoline (a) Cracking, (b) Synthesis
Which of the following pairs of species has same electronic configuration: (1) Zn 2 and Ni 2+ (2) Co +3 and Ni 4 (3) Co 2+ and Ni
how is hydrogen peroxide storage in equatorial places (phil)? should it require 2-8 deg C? or ambient room? any special cabinets or equipment sof storing?
fundamentals of analytical chemistry 8th edition
Chromatography - Purification of organic compounds This is a modern technique employed for the separation of mixtures into its components, purification of compounds and as well
how many type of atom?
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