Analytical ChemistryHard
Question
Which of the following statement(s) is/are true?
Options
A.Titan yellow solution gives red colouration with a neutral solution containing Mg2+ ions
B.Solution of nitrite is decomposed by sulphamic acid.
C.Fe2+ ions give brown colour precipitate with [Fe(CN)6]3- ions solution
D.Green precipitate of Cr(OH)3 is soluble in Na2O2.
Solution
(A) Red colour solution or precipitate is produced when reagent reacts in alkaline solution.
(B) HO.SO2.NH2 + HNO2 → N2 + 2H+ + SO42- + H2O.
(C) Fe2+ + [Fe(CN)6]3- → Fe3+ + [Fe(CN)6]4-.
4Fe3+ + [Fe(CN)6]4- → Fe4[Fe(CN)6]3 ↓ (Turnbull′s blue).
(D) 4Cr(OH)3 ↓ + 5O22- → 4CrO42- (yellow solution) + 6H2O.
(B) HO.SO2.NH2 + HNO2 → N2 + 2H+ + SO42- + H2O.
(C) Fe2+ + [Fe(CN)6]3- → Fe3+ + [Fe(CN)6]4-.
4Fe3+ + [Fe(CN)6]4- → Fe4[Fe(CN)6]3 ↓ (Turnbull′s blue).
(D) 4Cr(OH)3 ↓ + 5O22- → 4CrO42- (yellow solution) + 6H2O.
Create a free account to view solution
View Solution FreeMore Analytical Chemistry Questions
A metal M and its compound can give the following observable changes in a sequence of reactions, M The metal M can be :...White precipitate of PbSO4 gets dissolved in :...Dimethyl gloxime gives a red preipitate with Ni2+, which is used for its detection. To get this precipitate reddily, the...Which one of the following compounds on reaction with Na2O2 in alkaline medium gives yellow colour solution?...A metal salt solution forms a yellow precipitate with potassium chromate in acetic acid, a white precipitate with dilute...