IIT JEE , AIEEE Forum - Chemistry , Inorganic Chemistry

ramkumar_november

Q1 . A is alpha glucose . B is beta glucose........
           (i) anomers

         (ii) no they cannot be called as enantiomers since they are not mirror images of each other

        (iii)anomer A is alpha glucose . refer to the text book for structure......

Q2.   2KI + HgI₂    ---------->   K₂HgI₄

reactant side 4 ions....... 2K⁺ and 2I^-

product side 3 ions ...... 2K⁺ and HgI₄ ^-

so no of ions has decreased...... so freezing point is raised.....

Q3
Cu2+ is hydrated well in aqueous solutions so it is more stable..... also the second ionisation enthalpy is compensated by the large negative hydration enthalpy. so Cu2+ is stable.......

Cu+ disproportionates in aqueous solutions........
2Cu+ -----------> Cu   + Cu2+

E^o value for this reaction is positive . so it is favoured.........

thus Cu2+ is more stable than Cu+.......

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