Write balanced equation for the following:
(i). `NaCl` is heated with sulphuric acid in the presence of `MnO_2`.
(ii). Chlorine gas is passed into a solution of NaI in water.

Explanation

`{:(NaCl +H_(2)SO_(4) to NaHSO_(4) +HClxx4),(4HCl+MnO_(2) to MnCl_(2) +Cl_(2) +2H_(2)O):}/(4NaCl+MnO_(2)+4H_(2)SO_(4) to 4NaHSO_(4)+MnCl_(2)+Cl_(2)+2H_(2)O)`
` (ii) Cl_(2)(g) +2NaI(aq) to 2NaCl(aq) +I_(2)(s)`