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GLASS: Glass is amorphous solid which is not true solid, it is rather super cooled liquid which possesses a very high viscosity. It has no fixed melting point, on heating gradually softens and then melts over a wide range of temperature into mobile liquid. The amorphous solid unlike crystalline solid breaks with conchoidal fracture. Glass is fused of silicates of sodium and calcium which is amorphous, hard brittle, transparent or translucent super cooled liquid, having high viscosity.
The ratio of the energy of a photon of 2000Å wavelength radiation to that of 4000 Å radiation is: (1) 1/4 (2) 4 (3) 1/2 (4) 2 Ans
why 4f electrons do not take part in bonding?
Although cholrine is electoon withdrawing group.yet it is ortho nd para directing in electrophilic aromatic substitution reactants.why? Ans) Halogens are an exception of the dea
how can we prepare adernaline from cyclohexane
Determine about the Antiferromagnetic materials Antiferromagnetic materials are materials in which almost all magnetic dipoles are linked up antiparallel to each other. Its sus
what are binary compounds of hydrogen?describe briefly hydrides formed by alkali metals and halogen?
preparations of hydroquinone
Iodometric Titrations and Iodimetric The reduction of free iodine to iodide ions and oxidation of iodide ions to free iodine takes place in these titrations. I 2 + 2e - →
what is mesomeric effect ,types ,applications
Generation of the electrophile : The electrophile is the carbocation produced by protonation of the alcohol oxygen and loss of water.
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