Analytical ChemistryHard
Question
An inorganic salt when heated with concentrated H2SO4 evolves a colourless pungent smelling gas but with concentrated H2SO4 and MnO2 evolves a coloured pungent smelling gas which bleaches moist litmus paper. The coloured gas is :
Options
A.NO2
B.Cl2
C.Br2
D.I2
Solution
Cl- + H2SO4 → HCl ↑ (colourless) + HSO4-
MnO(OH)2 + 2H2SO4 + 2Cl- → Mn2+ + Cl2 ↑ (yellowish green) + 2SO42- + 3H2O
Cl2 + H2O → 2HCl + [O]
Litmus + [O] → colourless oxidised form
Cl2 is a yellowish green gas which bleaches litmus paper by oxidation.
MnO(OH)2 + 2H2SO4 + 2Cl- → Mn2+ + Cl2 ↑ (yellowish green) + 2SO42- + 3H2O
Cl2 + H2O → 2HCl + [O]
Litmus + [O] → colourless oxidised form
Cl2 is a yellowish green gas which bleaches litmus paper by oxidation.
Create a free account to view solution
View Solution FreeMore Analytical Chemistry Questions
To a solution of a substance, gradual addition of ammonium hydroxide results in a brownish black precipitate which does ...Which of the following statement (s) is (are) correct with reference to the ferrous and ferrici ions?...Potassium chromate solution is added to an aqueous solution of a metal chloride. The yellow precipitate thus obtained is...H2S does not produce metallic sulphide with :...A gas ′X′ is passed through water to form a saturated solution. The aqueous solution on treatment with silve...