Name the following compounds :
Oxides of sulphur :
(i) `S_2 O`
(ii) `S_2 O_3`
(iii) `SO_4`
(iv) `S_2 O_7`.
(b) Oxyacids of sulphur :
(i) `H_2 SO_2`
(ii) `H_2 SO_3`
(iii) `H_2 S_2 O_4`
(iv) `H_2 S_2 O_2`
(v) `H_2 S_2 O_5`.
(c) Sulphuric acid : (i) `H_2 S_2 O_3`
(ii) `H_2 S_2 O_7`
(d) Thionic acids : (i) `H_2 S_2 O_6`
(ii) `H_2 (S)_n O_6`
( e) Peroxo acids : (i) `H_2 SO_5`
(ii) `H_2 S_2 O_8`.

Explanation

(a) (i) `S_(2)` O - Sulphur monoxide
(ii) `S_(2) O_(3)` - Sulphur sesquioxide
(iii) SO - Sulphur tetroxide
(iv) `S_(2) O_(7)` - Sulphur heptoxide
(b) (i) `H_(2) SO_(2)` - Sulphoxylic acid
(ii) `H_(2) SO_(3)` - Sulphurous acid
(iii) `H_(2) S_(2) O_(4)` - Hyposulphurous acid or dithionous acid
(iv) `H_(2) S_(2) O_(2)` - Thiosulphrous acid
(v) `H_(2) S_(2) O_(5)` - Pyrosulphurous acid
(c) (i) `H_(2) S_(2) O_(3)` - Thiosulphuric acid
(ii) `H_(2) S_(2) O_(7)` - Pyrosulphrous acid or Oleum or fuming sulphuric acid
(d) (i) `H_(2) S_(2) O_(6)` - Dithionic acid
(ii) `H_(2) (S)_(n) O_(6)` - Polythionic acid
(e) (i) `H_(2) SO_(5)` - Peroxomonosulphuric acid
(ii) `H_(2) S_(2) O_(8)` - Peroxodisulphuric acid.