1.

Describe anomalous behaviour of oxygen as compared with other elements of group16 with reference to : (a) Magnetic property(b) Oxidation state (c ) Hydrides

Answer»

Solution :(a) Magnetic property : Oxygen `(O_(2))` is paramagnetic while others are diamagnetic . Oxygen isparamagnetic due to TWO unpaired ELECTRONS in its outermost shell .
(b) Oxiddation state :Oxygen shows oxidtion state of - 2 in most of its compunds . It also shows an oxidation state of `+` 2 in `Fe_(2)O" and" -1 "in " H_(2)O_(2)`and it CONNOT show oxidation state BEYOND 2, while , other elements shows oxidation state of `+ 2 , + 4 "and" + 6 ` because theseelements have vacant d - orbitals , so that their shell can expand .
(c ) Hydrides : Hydrides of oxygen such as `H_(2)O` axists as liquid while all other hydrides are gases.


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