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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.
covalent bond
a metal forms 2 oxides. the higher oxide has 80% metal. 0.72g of lower oxide gave 0.8g of higher oxide when oxidised. show that law of multiple proportion is valid?
(a) Give short notes of two basic types of sewerage system for collection of wastewater and surface water from built-up areas. (b) Many countries have included wastewater reuse
Q. Physical Properties of group16? Similar to the groups discussed earlier. The metallic character in Group 16, increases with increasing atomic number. Oxygen and sulphur are
Describe about the Ferromagnetic materials Ferromagnetic materials are those for which k susceptibility is large and positive. These are strongly attracted by magnetic field. I
Chemical Properties Proteins - Oxidation Oxidation : Proteins are oxidised on putrefaction and burning. The products comprise amines, nitrogen, carbon dioxide and water. The un
two equivalent - one equivalent
what is covalent bond and its types?
Use the given data to construct a thermodynamical Born-Haber-cycle of the formation of potassium chloride from its elements and calculate the lattice energy of potassium chloride.
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
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