What is the name given to the salts of :
(a) sulphurous acid, (b) sulphuric acid ?
Which concentrated acid oxidises sulphur directly to sulphuric acid? Write the equation for the same. What is the name of the process by which sulphuric acid is manufactured? Name the catalyst used in the process.
Name the gas obtained when rock salt reacts with conc. sulphuric acid.