When intimate mixture of potassium dichromate and potassium chloride is heated with conc.`H_(2)SO_(4)` which of the following is produced in the form of red vapours ?

When a mixture of potassium cyanate and ammonium chloride is heated, it gives

On heating, a mixture of potassium cyanate and ammonium chloride gives :

Write the balanced chemicalm equations for the following reactions (i) A mixture of potassium dichromate and sodium chloride is heated with concentrated H_(2)SO_(4) (ii) Potassium permanganate is added to a hot solution of manganous sulphate.