Analytical ChemistryHard
Question
Consider the following statements,
S1 : yellow precipitate of SrCrO4 is soluble in large quantity of water.
S2 : yellow precipitate of BaCrO4 is insoluble in dilute acetic acid.
S3 : yellow precipitate of PbCrO4 is not soluble in sodium hydroxide.
S4 : white precipitate of Pb(CN)2 is soluble in excess of KCN.
and arrange in the order of true / false.
S1 : yellow precipitate of SrCrO4 is soluble in large quantity of water.
S2 : yellow precipitate of BaCrO4 is insoluble in dilute acetic acid.
S3 : yellow precipitate of PbCrO4 is not soluble in sodium hydroxide.
S4 : white precipitate of Pb(CN)2 is soluble in excess of KCN.
and arrange in the order of true / false.
Options
A.T F T T
B.T T F F
C.F T F T
D.T T T F
Solution
S1 : The precipitate is appreciably soluble in water.
S2 : True.
S3 : PbCrO4↓ + 4OH- → [Pb(OH)4]2- + CrO42-
S4 : Pb(CN)2↓ + CN- → No reaction.
S2 : True.
S3 : PbCrO4↓ + 4OH- → [Pb(OH)4]2- + CrO42-
S4 : Pb(CN)2↓ + CN- → No reaction.
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