question_answer

Direction for: In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as

Assertion: \[\text{F}{{\text{e}}^{\text{3+}}}\] is more stable than \[\text{F}{{\text{e}}^{\text{2+}}}.\] Reason: \[\text{F}{{\text{e}}^{\text{2+}}}\]ions are easily oxidized to \[\text{F}{{\text{e}}^{3+}}\] ions.

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.

C) If Assertion is true but Reason is false.

D) If both Assertion and Reason are false.

Correct Answer: B

Solution :

\[\text{F}{{\text{e}}^{3+}}\]is more stable than \[\text{F}{{\text{e}}^{2+}}.\]The electronic configuration of Fe34^ has half filled d-orbital and thus, more stable. \[{{\,}_{26}}F{{e}^{2+}}=1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},{{3}^{2}}3{{p}^{6}}3{{d}^{6}}\] \[{{\,}_{26}}F{{e}^{3+}}=1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{5}}\]