(a) What inspired N.Bartlett for carrying out reaction between Xe and `PtF_(6)` ?
(b) Arrange the following in the order of property indicated against each set :
(i) `F_(2), I_(2), Br_(2), CI_(2)` (increasing bond dissociation enthalpy)
(ii) `NH_(3), AsH_(3), SbH_(3), BiH_(3), PH_(3)` (decreasing base strength)
(c) Complete the following equations :
(i) `CI_(2) + NaOH ("cold and dilute") to`
(ii) `Fe^(3+) SO_(2) + H_(2)O to`

Explanation

(a) N.Barlett first prepared a red compound `O_(2) ""^(+)PtF_(6)^(-)`. He then realised that the first ionisation enthalpy of molecular oxygen was almost identical with Xenon. So, he carried out reaction between `Xe " and " PtF_(6)`.
(ii) (i) `I_(2) lt F_(2) lt Br_(2) lt CI_(2)`
(ii) `NH_(3) gt PH_(3) gt AsH_(3) gt SbH_(3) gt BiH_(3)`
(c) (i) `2NaOH + CI_(2) to NaCI + NaOCI + H_(2)O`
(ii) `2Fe^(3+) + SO_(2) + 2H_(2)O to 2Fe^(2+) + SO_(4)^(2+) + 4H^(+)`