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Step growth or condensation polymerisation
In this form of polymerisation monomers usually consist of two functional sets, that is difunctional monomers. In that method no initiator is required and each step is similar type of chemical reaction. As in that polymerisation reaction the polymer is made in a stepwise manner. It is described as step growth polymer and the process is described as step growth polymerisation. The process for two monomer A and B can be expressed as.
Types of addition reactions Addition reactions can be categorized into three categories on the basis of the nature of initiating species. (A) Electrophilic additions (B)
hitorff method
Till 20elememts write the no of electrons in outermost shell.if less than 4 then this is the valency otherwise subtract from 8
Critical Angle: The particular angle of incidence at which angle of refraction becomes 90 is known as critical Angle and it is denoted by θc
Sublimation - Purification of organic compounds Specific organic solids on heating directly change from solid to vapour state without passing via a liquid state, such types of
how to determine the bond polarity and the potential of the two electrodes given: Eg Ag/Zn
If change in energy (ΔE) = 3x 10 -8 j, h= 6.64x 10 -34 j-s and c= 3x 10 8 m/s then wavelength of the light is: (1) 6.36x 10 3 Å (2) 6.36x 10 5 Å
Coordination no. is the no. assigned to an atom which tells us that how many other atoms are directly attached to it. eg. Pcl5 the cordination no. will be 5
Angular functions: 'shapes' The mathematical functions for atomic orbitals may be described as a product of two factors: the radial wavefunction defines the behavior of th
what are basic radicals
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