NO2 contains odd number of valence electrons. It behaves as a typical odd molecule. On dimerisation, it is converted to stable N2O4 molecule with even number of electrons.
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413.What type of hybridisation is associated with N in NH3,? What is the expected bond angle in NH3?
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414.NO2 is coloured but its dimer N2O4 is colourless. Why?
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415.Arrange the hydrides of group 15 in decreasing order of basic strength.
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416.Why ammonia is a good complexing agent?
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417.The experimentally determined N — F bond length in NF3 is greater than the sum of the single bond covalent radii of N and F. Why?
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418.In what why it can be proved that PH3 is basic in nature?
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419.Nitric acid (dilute or conc) renders aluminium passive. Why?
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420.Phosphine has a lower boiling point than ammonia. Give a reason.
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