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Cross linked polymers :
1. These are polymers where monomers unit are crosslinked together to make a three dimensional network polymers.
2. These kind of polymers are hard, rigid and brittle due to network structure for example melamine, Bakelite, formaldehyde resin etc.
which is the main postulate of bohr''s model of atom
How many gaseous elements are there in the s block of modern periodic table? What are they??
What is it?
Qualitative analysis A salt contains two parts defined as radicals. The positively charged part of a salt (cation) that has been derived from a base is known as basic radical a
What is hydrometallurgy
A hypothetical molecule, X–Y, has a dipole moment of 1.48 D and a bond length of 161 pm. Calculate the percent ionic character of this molecule
the increasing order(lower first) for the values of e/m (charge/mass) for e,p,n,a?
Solid xenon forms crystals with a face centered unit cell that has an edge of 620 pm. 1. calculate the atomic radius of xenon. 2. calculate the packing efficiency if xenon. So
IONS IN AQUEOUS SOLUTION Ionic models : Ions are charged chemical substance. Positively charged ions are called cations as they travel to the cathode of an electrolytic c
What is basically Gibb''s free energy change? Ans) The energy associated with a chemical reaction that can be used to do work. The free energy of a system is the sum of its entha
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