કેન્દ્ર અનુરાગીનો સાચો ક્રમ કયો છે.

A \(F ^{-}> OH ^{-}\)
B \({{H}_{2}}\underset{\scriptscriptstyle\centerdot\centerdot}{\ddot{O}} > OH ^{-}\)
C \(R \underset{\scriptscriptstyle\centerdot\centerdot}{\ddot{O}} H> RO ^{-}\)
D \(NH _{2}^{-}> NH _{3}\)

Verified Solution

Answer & Solution

Correct Answer

(D) \(NH _{2}^{-}> NH _{3}\)

Step-by-step Solution

Detailed explanation

Nucleophilicity \(\propto\) electro density on donor atom \(\propto\) size of donor atom (in gas) \(\propto \frac{1}{\text { EN of atom }}\) (for period)

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

સૂચિ-I ને સૂચિ-II સાથે જોડો

સૂચિ-I પ્રક્રિયકો		સૂચિ-II કાર્બોનિલ સંયોજનને સંડોવતી પ્રતિક્રિયાનું નામ
A.	\(NH _2- NH _2, KOH\)	I.	ટોલેન્સ કસોટી
B.	\(Ag \left( NH _3\right)_2 OH\)	II.	ક્લેમેન્સન રિડક્શન
C.	Aq. \(CuSO _4\), સોડિયમ પોટેશિયમ ટાર્ટરેટ, KOH	III.	વુલ્ફ-કિશનર રિડક્શન
D.	\(Zn - Hg , HCl\)	Iv.	ફેહલિંગ કસોટી

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JEE Mains 2026 Medium

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પદાર્થ	\(\frac{\Delta_{ f } H ^{\ominus}(500 K)}{ kJ mol ^{-1}}\)	\(\frac{ S ^{\ominus}(500 K)}{ JK ^{-1} mol^{-1}}\)
\(AB ( g )\)	32	222
\(A _2(g)\)	6	146
\(B _2(g)\)	X	280