enEnglishguગુજરાતી

JEE Mains · Chemistry · STD 11 - 3. Classification of elements and periodicity in properties

The element with which of the following outer electron configuration may exhibit the largest number of oxidation states in its compounds

A \(3d ^5\,4s^2\)
B \(3d ^8\,4s^2\)
C \(3d ^7\,4s^2\)
D \(3d ^6\,4s^2\)

Verified Solution

Answer & Solution

Correct Answer

(A) \(3d ^5\,4s^2\)

Step-by-step Solution

Detailed explanation

The element with outer electron configuration \(3d^5\, 4s^2\) is \(Mn\) which exhibits oxidation states from \(+ 2\) to \(+ 7\)

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

Same subject

Match List \(-I\) with List \(-I I\)

સૂચી \(- I\)	સૂચી \(- II\)
\((A)\) \(\left[ PtCl _{4}\right]^{2-}\)	\((I)\) \(sp ^{3} d\)
\((B)\) \(BrF _{5}\)	\((II)\) \(d ^{2} sp ^{3}\)
\((C)\) \(PCl _{5}\)	\((III)\) \(dsp ^{2}\)
\((D)\) \(\left[ Co \left( NH _{3}\right)_{6}\right]^{3+}\)	\((IV)\) \(sp ^{3} d ^{2}\)

JEE Mains 2022 Medium

Explore more questions on app

From JEE Mains

Explore more questions on app

List-I		List-II
(A)	Al³⁺ < Mg²⁺ < Na⁺ < F^-	(I)	Ionisation Enthalpy
(B)	B < C < O < N	(II)	Metallic character
(C)	B < Al < Mg < K	(III)	Electronegativity
(D)	Si < P < S < Cl	(IV)	Ionic radius