Give reason why?
Conc. `H_(2)SO_(4)` is not a drying agent for `H_(2)S?`

Why is H_2SO_4 not a drying agent for H_2S ?

Give reasons : Conc. sulphuric acid is used as drying agent.

overset("Conc". H_(2)SO_(4))rarr(A)

Anhydrous CaCl_(2),P_(4)O_(10) or concentrated H_(2)SO_(4) can not be used as drying agent for ammonia.Why ?

Conc. HNO_(3)+H_(2)SO_(4) mixture gives

on dehydration with conc. H_(2)SO_(4) forms predominantly :

Which one of H_(2)SO_(4), P_(2)O_(5), and CaO is used as drying agent for ammonia?

A colourless inorganic compound (A) imparts a green colour to flame. Its solution does not give white precipitate with H_(2)S . Its solution gives white precipitate with conc. H_(2)SO_(4) which is insoluble in dil. H_(2)SO_(4) . When it is heated with K_(2)Cr_(2)O_(7) and conc. H_(2)SO_(4) , a red gas is evolved. The gas when passed through aqueous NaOH solution turns it Yellow. Identify the compound (A) and give chemical reactions.

Why conc. H_2SO_4 is stored in air tight bottles ?