When $\mathrm{NaCl}$, $\mathrm{K}{}_2\mathrm{Cr}{}_2\mathrm{O}{}_7$ and conc. $\mathrm{H}{}_2\mathrm{SO}{}_4$ are heated together, dark red vapours are formed. The vapour is

More questions on Precipitation reactions and confirmatory tests

• A sodium salt gives a fruity smell on warming with ethanol and concentrated H2SO4 and a deep red colour with neutral FeCl3. Assuming the aci... JEE Advanced level
• A white curdy precipitate with AgNO3 that readily dissolves in dilute aqueous ammonia indicates the presence of NEET level
• A yellow precipitate formed with AgNO3 is insoluble even in concentrated ammonia. The anion present is NEET level
• In the brown ring test the complex [Fe(H2O)5NO]^2+ is formulated with NO as NO+. The oxidation state of iron is JEE Main level
• Before the brown ring test for nitrate, Br^- and I^- must be removed because JEE Main level
• AgCl dissolves in ammonia: AgCl + 2NH3 <=> [Ag(NH3)2]+ + Cl-. Take K_sp(AgCl) = 1.8x10^-10 and K_f([Ag(NH3)2]+) = 1.6x10^7. The equilibrium ... JEE Main level