AIIMS 2018 Chemistry Brown Ring Test Assertion Reason Question
Assertion: Fe³⁺ is not valid for Brown Ring Test. Reason: Because NO₃⁻ first convert into NO₂⁻
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Correct Answer
Detailed Explanation
Fe³⁺ is indeed not valid for the Brown Ring Test, which is specifically used to detect Fe²⁺ ions in the presence of nitrate ions (NO₃⁻) that reduce to form a complex with Fe²⁺. However, the reason provided is incorrect because NO₃⁻ does not convert to NO₂⁻ in this context; it remains as NO₃⁻ during the test. Option A is incorrect because the reason does not explain the assertion, while Option B is incorrect as the reason is false. Option D is also incorrect since the assertion is true.
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