Write the structural formulae of
(i) Sulphurous acid `(H_(2)S0_(3))` and
(ii) Sulphuric acid `(H_(2)SO_(4))` 

The oxidation numbers of the sulphur atoms in pcroxy- monosulphuric acid (H_(2)SO_(5)) and peroxydisulphuric acid (H_(2)S_(2)O_(8)) are respectively.

Give the structural formula for the following : (i) Phosphorous acid, H_3 PO_3 (ii) Pyrophosphoric acid, H_4 P_2 O_7 .

Calculate percentage of sulphur in sulphuric acid (H_(2)SO_(4)) .

Calculate percentage of sulphur in sulphuric acid (H_(2)SO_(4)) .

Draw structure Caro's acid (H_(2)SO_(5))

Calculate the number of atoms of hydrogen, oxygen and sulphur in 0.2 mole of sulphuric acid (H_(2)SO_(4)) .

Sulphuric acid [conc.] NH_(3)+H_(2)SO_(4) to_____

Write the structural formula of ethanol. What happens when it is heated with excess of conc. H_(2)SO_(4) acid at 443 K? Write the chemical equation for the reaction, starting the role of conc. H_(2)SO_(4) acid in this reaction.

How are SO_(2) Cl_(2).SO_(3) and SO_(2) obtained from sulphuric acid ?

The oxidation number of sulphur in H_(2)S_(2)O_(8) is: