NEET · Chemistry · STD 11 - 8.4. Organic chemistry reaction mechanism

Which of the following is correct with respect to \(-I\) effect of the substituents ? (\(R =\) alkyl)

A \(-\mathrm{NH}_{2} < -\mathrm{OR} < -\mathrm{F}\)
B \(-\mathrm{NR}_{2} < -\mathrm{OR} < -\mathrm{F}\)
C \(-\mathrm{NH}_{2}>-\mathrm{OR}>-\mathrm{F}\)
D \(-\mathrm{NR}_{2}>-\mathrm{OR}>-\mathrm{F}\)

Verified Solution

Answer & Solution

Correct Answer

(A) \(-\mathrm{NH}_{2} < -\mathrm{OR} < -\mathrm{F}\)

Step-by-step Solution

Detailed explanation

(Based on EN) \(\therefore \quad-\mathrm{NH}_{2}<-\mathrm{OR}<-\mathrm{F} \quad-\mathrm{I}\) effect

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.

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From NEET

Match List \(I\) with List \(II\)

List \(I\)(Quantum Number)	List \(II\)(Information provided)
\(A\). mı	\(I\). Shape of orbital
\(B\). \(m_s\)	\(II\). Size of orbital
\(C\). \(1\)	\(III\). Orientation of orbital
\(D\). \(\mathrm{n}\)	\(IV\). Orientation of spin of electron

Choose the correct answer from the options given below :

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