Chemistry
Why is:
(a) Concentrated sulphuric acid kept in air-tight bottles?
(b) H2SO4 is not used as a drying agent for H2S?
(c) Sulphuric acid used in the preparation of HCl and HNO3? Give equations in both cases.
Related Questions
Give reasons for the following.
(a) Sulphuric acid forms two types of salts with NaOH.
(b) A piece of wood becomes black when concentrated sulphuric acid is poured on it.
(c) Brisk effervescence is seen when oil of vitriol is added to sodium carbonate.
Why is water not added to concentrated H2SO4 in order to dilute it?
State your observation when –
(a) Sugar crystals are added to a hard glass test tube containing conc. sulphuric acid.
(b) Conc. H2SO4 is added to a crystal of hydrated copper sulphate.
Give balanced equation(s) for :
(a) Reaction of dilute sulphuric acid when poured over sodium sulphite
(b) Manufacture of sulphuric acid by the Contact process.
(c) Heating sulphur with conc. sulphuric acid
(d) Dehydration of sugar crystals by conc. sulphuric acid
(e) Action of concentrated sulphuric acid on carbon.