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AIIMS 201827 May
Exam
AIIMS
Year
2018
Date
27 May
Subject
Chemistry
Chapter
p Block Elements (Group 15, 16, 17 & 18)

AIIMS 2018 · 27 May · Chemistry · p Block Elements (Group 15, 16, 17 & 18)

Assertion : Brown ring test is not valid for Fe^ +3 ion. Reason :...

Assertion : Brown ring test is not valid for Fe+3\mathrm{Fe}^{+3} ion. Reason : Because NO3−\mathrm{NO}_3^{-}ion first gets converted into NO2−\mathrm{NO}_2^{-}ion.

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion.
  2. BIf both assertion and reason are true but reason is not the correct explanation of assertion.
  3. CIf assertion is true but reason is false.
  4. DIf both assertion and reason are false.

Correct answer

C. If assertion is true but reason is false.

Step-by-step solution

In brown ring test, Fe2+\mathrm{Fe}^{2+} ion oxidises to Fe3+\mathrm{Fe}^{3+} ion, and NO3−\mathrm{NO}_3^{-}ion reduces to NO. Brown ring test is valid for Fe2+\mathrm{Fe}^{2+} ion.
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