Chromyl chloride vapours are dissolved in water and acetic acid and barium acetate solution is added, then :

Acetic chloride cannot be obtained by treated acetic acid with

Acetic chloride cannot be obtained by treating acetic acid with

When lassaigne's extract (Na_(2)S) is acidified with acetic acid and then lead acetate solution is added to it, the colour of the precipitate is

When Lassaigne's extract (Na_(2)S) is acidified with acetic acid and then lead acetate solution is added to it, the colour of the precipitate is