Following two statements are providedStatement-I: Certain chlorides do not show positive response to chromyl chloride test.Statement-II: Chromyl chloride test is positive for Cr3+ ions.Statement-I and statement-II both are wrongStatement-I is wrong and statement-II is correctStatement-I is correct and statement-II is wrongStatement-I is correct and statement-II is correct explanation of statement-I
Question
Following two statements are providedStatement-I: Certain chlorides do not show positive response to chromyl chloride test.Statement-II: Chromyl chloride test is positive for Cr3+ ions.Statement-I and statement-II both are wrongStatement-I is wrong and statement-II is correctStatement-I is correct and statement-II is wrongStatement-I is correct and statement-II is correct explanation of statement-I
Solution
The chromyl chloride test is used to detect chloride ions in a solution. When a chloride salt is mixed with potassium dichromate and sulfuric acid, chromyl chloride is formed if chloride ions are present. This compound is a reddish-brown gas that can be seen in the test tube.
Statement-I: Certain chlorides do not show a positive response to the chromyl chloride test. This statement is correct. Not all chlorides will react to form chromyl chloride. For example, chlorides of silver and lead do not respond to this test because they form insoluble chlorides that do not react with chromyl chloride.
Statement-II: Chromyl chloride test is positive for Cr3+ ions. This statement is incorrect. The chromyl chloride test is not used to detect Cr3+ ions. It is used to detect chloride ions. The presence of Cr3+ ions does not give a positive result in this test.
Therefore, the correct answer is: Statement-I is correct and statement-II is wrong.
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