permanent hardness from water, Chemistry

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Removing of permanent hardness from water

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Ratio of radii of second and first Bohr orbits of H atom: (1) 2        (2) 4        (3) 3        (4) 5 Ans: 4

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K c is the equilibrium constants when the concentrations are expressed in moles/litre K c = Product of concentrate ions of products / product of concentrate ions of reactants

Energy of the electron in hydrogen atom is given, Energy of the electron in...

Energy of the electron in Hydrogen atom is given by: (1) E n = 131.38/ n 2 x kj mol -1         (2)  E n = 131.33/n xkj mol -1           (3) E n = 1313.3/ n 2 x kj mol

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why water molecule forms covalent bond even though it dissociates into ions

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