What happens when :
(a) Ozone is passed through acidified stannous chloride solution.
(b) Potassium iodide is heated with `conc. H_2 SO_4`.
(c) Sulphur is boiled with caustic soda solution.
(d) Ozone reacts with potassium ferrocyanide solution.
( e) Ozone is treated with ethylene.
(f) Sulphur dioxide is bubbled through aqueous solution of copper sulphate in presence of potassium thiocyanate.
(g) Sulphur dioxide gas, water vapour and air are passsed over heated sodium chloride.
(h) Sulphuric acid is treated with `PCl_5`.

Explanation

(a) `3 SnCl_(2) + 6 HCl + O_(3) rarr 3 SnCl_(4) + 3 H_(2) O`
(b) `2 KI + H_(2) SO_(4) rarr K_(2) SO_(4) + 2 HI`
`2 HI + H_(2) SO_(4) rarr I_(2) + SO_(2) + 2 H_(2) O`
(c) `4S + 6NaOH rarr Na_(2) S_(2)O_(3) + 2 Na_(2) S + 3 H_(2) O overset("Excess sulphur") rarr Na_(2) S_(5)`
(d) `2 K_(4)Fe(CN)_(6) + O_(3) + H_(2) O rarr 2 K_(3) Fe(CN)_(6) + 2 KOH+ O_(2)`
( e)
(f) `2 CuSO_(4) + SO_(2) + 2KCNS + 2 H_(2) O rarr 2CuCNS + K_(2) SO_(4) + 2 H_(2) SO_(4)`
(g) `2SO_(2) + O_(2) + 2 H_(2) O rarr 2 H_(2) SO_(4)`
`2 NaCl + H_(2) SO_(4) rarr Na_(2) SO_(4) + 2 HCl`
(h) `H_(2) SO_(4) + 2 PCl_(5) rarr SO_(2) Cl_(2) + 2POCl_(3) + 2 HCl`.