Comment on the following.
(a)Electrolysis of ICN in pyridine solution.
(b)Iodine dissolves in oleum
( c)Electrical conductivity of molten iodine

Explanation

(a)Iodine is liberated at cathode indicating the ionisation of ICN into `I^(+)` and `CN^(-)`
(b)Bright blue solution is formed which has been shown to have `I_(2)^(+)` and `I_(3)^(+)`
`2l_(2)+6H_(2)SO_(4).SO_3to2l_(2)^(+)+2HS_3O_10^(-)+5H_(2)SO_4+SO_2`
`3l_2+6H_2SO_4.SO_3to2l_3^(+) + 2HS_3O_10^(-)+5H_2SO_4+SO_2`
( c)It is due to the presence of `(l_3^+ and l_3^(-))` species produced by self ionisation of iodine `3l_2 hArr l_3^(+)+l_3^-`