Identify the substance acting as oxidant or reductatant if any in the following:
(i) `AlCl_(3) + 3K rarr Al + 3KCl`
(ii) `SO_(2) + 2H_(2)S rarr 3S + H_(2)O`
(iii) `BaCl_(2) + Na_(2)SO_(4) rarr BaSO_(4) + 2NaCl`
(iv) `3I_(2) + 6NaOH rarr NalO_(3) + 5Nal + 3H_(2)O`

Answer

(i) Oxidant `-AlCl_(3)`, Reducant `-K`
(ii) Oxidant `-SO_(2)`, Reducatn `- H_(2)S`
(iii) None
(iv) Oxidant `-I_(2)`, Reducant `- I_(2)`