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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.
During a flame test why is calcium''s flame not persistent, while that of strontium is? Ans) Because it does not have many ions as compared to the Strontium. It is the ions whic
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The specific charge of proton is 9.6 X 10 6 CKG -1 then for an α-particle it will be : (1) 38.4X 10 7 Ckg -1 (2) 19.2x 10 7 Ckg -1 (3) 2.4 x 10
Trace and ultratrace analysis: The accuracy, precision and detection limits of flame AAS depend on how the analyte sample is introduced into the atomiser. We need to transfer
Preparation of ethane by lab method
I have 11.2 L of a gas at stp. I need to use the molar volume to find how many molecules are in that gas.
For n= 3 energy level, the number of possible orbitals (all kinds) are: (1) 1 (2) 3 (3) 4 (4) 9 Ans: 9
Physical properties of Benzaldehyde (a) It is a colourless oily liquid. The boiling point of it is 179° C. (b) Benzaldehyde has smell of bitter almonds. (c) Benzaldehyde
Till 20elememts write the no of electrons in outermost shell.if less than 4 then this is the valency otherwise subtract from 8
Rutherford's alpha particle scattering experiment eventually led to the conclusion that: (1)The point of impact with matter can be precisely determined (2)Electrons occupy s
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