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
Ni + H2SO4 (hot and concentrated) → X(g). The liberated gas (select the correct statement) :...Concentrated aqueous ammonia dissolve(s) which of the following completely ?...CrO42- + H+ + H2O2 X + H2OIdentify the correct statement with respect to X....A metal nitrate solution does not give white precipitate with concentrated hydrochloric acid but on dilution with water ...The beta and alpha glucose have different specific rotations. When either is dissolved in water, their rotation changes ...