Analytical ChemistryHard
Question
Which of the following anion(s) evolve(s) reddish brown gas with concentrated H2SO4?
Options
A.Br-
B.NO3-
C.SO32-
D.I-
Solution
(A) Br- + H+ → HBr ↑ ; 2HBr + 2H2SO4 → Br2↑ (reddish brown) + SO2 ↑ + SO42- + H2O.
(B) 4NO3- + 2H2SO4 → → 4NO2 ↑ (reddish brown) + O2 ↑ + 2SO42- + 2H2O.
(C) SO32- + 2H+ → SO2 ↑ (colourless) + H2O.
(D) 3I- + 2H2SO4 → I3- ↑ (violet/purple) + SO42- + 2H2O + SO2.
(B) 4NO3- + 2H2SO4 → → 4NO2 ↑ (reddish brown) + O2 ↑ + 2SO42- + 2H2O.
(C) SO32- + 2H+ → SO2 ↑ (colourless) + H2O.
(D) 3I- + 2H2SO4 → I3- ↑ (violet/purple) + SO42- + 2H2O + SO2.
Create a free account to view solution
View Solution FreeMore Analytical Chemistry Questions
Select the correct statement with respect to Ca2+ ions....Which of the following solutions give white precipitate with Pb(NO3)2 as well as with Ba(NO3)2 ?...A metal M and its compound can give the following observable changes in a sequence of reactions, M The metal M can be :...Which one of the following can be used in place of NH4Cl for the identification of the third group radicals?...When a mixture of solid NaCl and solid K2Cr2O7 is heated with concentrated H2SO4, deep red vapours are obtained. This is...