NEET Chemistry Functional Group Tests MCQ Question
Which of the following combinations correctly identify the presence of oxalate ions in a solution?
Acidifying sodium carbonate extract with acetic acid and adding calcium chloride solution; Discharging pink color of KMnO4 by warming with dilute H2SO4.
Adding potassium ferrocyanide to an acidified blue solution; Observing a white precipitate with Nessler's reagent.
Forming a white precipitate of calcium oxalate; Passing evolved gas through lime water.
Using dil. H2SO4 to precipitate oxalate; Observing no color change with KMnO4.
Correct Answer
Detailed Explanation
Option A describes two tests for confirming oxalate ions: the first involves adding calcium chloride to an acidified sodium carbonate extract to form a white precipitate of calcium oxalate, while the second involves warming with dilute H2SO4 to discharge the pink color of KMnO4, indicating the presence of oxalic acid.
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