NEET Chemistry Organic Preparations MCQ Question
Which combinations of statements accurately describe the reactions involved in organic preparations related to iodide ions?
Iodide ions can be confirmed by adding MnO2 and concentrated H2SO4, producing iodine vapors. The presence of violet color in an organic solvent indicates iodide ions.
Heating iodide ions with sodium carbonate leads to the release of chlorine gas. The violet color in organic solvents is due to potassium dichromate.
Adding silver nitrate to a sodium carbonate extract produces a curdy white precipitate, confirming the presence of iodide ions.
Iodide ions can be detected through the formation of a blue color with starch when iodine is present in the solution.
Correct Answer
Detailed Explanation
Statement A correctly describes the reaction of iodide ions with MnO2 and concentrated H2SO4, leading to iodine vapor, and the confirmation of iodide ions by a violet color in the organic layer. Other options either introduce incorrect reactions or misinterpret the confirmatory tests.
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