ChemistryA salt(A) when heated with K2Cr2O7 and conc. H2SO4 liberates a gas which is absorbed in NaOH solution. The NaOH solution turns yellow. When this solution is acidified with acetic acid and lead acetate solution is added, a yellow precipitate(B) is formed. (A) is mixed with MnO2 and heated with conc. H2SO4 when a gas (C) is evolved which turns starch – iodide paper blue.
A salt(A) when heated with K2Cr2O7 and conc. H2SO4 liberates a gas which is absorbed in NaOH solution. The NaOH solution turns yellow. When this solution is acidified with acetic acid and lead acetate solution is added, a yellow precipitate(B) is formed. (A) is mixed with MnO2 and heated with conc. H2SO4 when a gas (C) is evolved which turns starch - iodide paper blue.
