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what is atom
how can we calculate it?
Till 20elememts write the no of electrons in outermost shell.if less than 4 then this is the valency otherwise subtract from 8
Calculate the activity co-efficient? The solubility of gaseous O 2 at a partial pressure of 1.01 bar and a temperature of 310.2K, ex- pressed as a concentration, is 1.07 *10 -
why alkanes are called paraffin
What is difference among silica used in TLC and HPLC column? Ans) TLC is known as thin layer chromatography. The simple methods works on the principle of adsorption, where as HP
Evidence in favor of Kekule's structure 1. Benzene combines along with 3 molecules of hydrogen or three molecules of chlorine. It also collides along with 3 atoms of ozone to
assignment of vbt
Properties and uses of D.D.T. (i) D.D.T. is approximately insoluble in water although it is moderately soluble in polar solvents. (ii) D.D.T. is a powerful insecticide. It i
The most important classification of elements is that of non-metallic versus metallic. Metallic elements form solids that are good conductors of electricity, and where bonding is n
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