Chemistry - Salt Analysis Question with Solution | TestHub

ChemistrySalt AnalysisMiscellaneous/MixedEasy2 minPYQ_2020
ChemistryEasysingle choice

Gradual addition of potassium iodide solution to aqueousBiNO33solution initially produces a dark brown precipitate which dissolves in excess ofKIto give a clear yellow solution. Identify the yellow precipitate.

Options:

Answer:
B
Solution:

At firstBiNO33undergoes hydrolysis.

Nitric acid is formed which oxidises I to iodine. The liberated iodine dissolves inKto form yellow precipitate ofKI3.

BiNO33+ H2OBiOHNO32 + HNO3

2HNO3H2O + 2NO2+ O

2KI+ H2O + O2KOH +I2Dark brown

I2+ KIKI3yellow solution

Stream:NTA_ABHYASSubject:ChemistryTopic:Salt AnalysisSubtopic:Miscellaneous/Mixed
2mℹ️ Source: PYQ_2020

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