Q39 / 180 · AIIMS 2018 (27 May) · Chemistry

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

  • A
    If both assertion and reason are true and reason is the correct explanation of assertion.
  • B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
  • Correct answer
    C
    If assertion is true but reason is false.
  • D
    If both assertion and reason are false.

Solution

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

Hence, the correct answer is option: 'C'.

Relevant Questions