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NEET Questions
Chemistry
Organic Chemistry - Some Basic Principles And Techniques
Recommended PYQs (STRICTLY NCERT Based)
Electron Displacement Effects (12 Qs)

1(current)
2

Q. No.

Methyl group attached to a positively charged carbon atom stabilizes the carbocation due to:

1. -I inductive effect
2. Electromeric effect
3. Hyperconjugation
4. Mesomeric effect

Q1:

73% From NCERT NEET - 2024

Subtopic: Electron Displacement Effects |

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NEET MCQ Books for XI^th & XII^th Physics, Chemistry & Biology

Given below are two statement:

I:	In an organic compound, when inductive and electromeric effects operate in opposite directions, the inductive effect predominates.
II:	Hyperconjugation is observed in o-xylene.

In the light of the above statements, choose the correct answer from the options given below:
1. Statement I is true but Statement II is false.
2. Statement I is false but Statement II is true
3. Both Statement I and Statement II are true.
4. Both Statement I and Statement II are false.

Q2:

From NCERT NEET - 2023

Subtopic: Electron Displacement Effects |

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Select the correct option based on the statements below:

Assertion (A):	Chlorine is an electron-withdrawing group, yet it exhibits ortho- and para-directing behavior in electrophilic aromatic substitution.
Reason (R):	Inductive effect of chlorine destabilises the intermediate carbocation formed during the electrophilic substitution, however due to the more pronounced resonance effect, the halogen stabilises the carbocation at ortho and para positions.

1.	Both (A) and (R) are True and (R) is the correct explanation of (A).
2.	Both (A) and (R) are True but (R) is not the correct explanation of (A).
3.	(A) is True but (R) is False.
4.	(A) is False but (R) is True.

Q3:

77% From NCERT NEET - 2022

Subtopic: Electron Displacement Effects |

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A tertiary butyl carbocation is more stable than a secondary butyl carbocation because-

1. + R effect of ${C H}_{3}$ groups

2. $-$ R effect of $-$ CH₃ groups

3. Hyperconjugation

4. $-$ l effect of $-$ CH₃ groups

Q4:

73% From NCERT NEET - 2020

Subtopic: Electron Displacement Effects | Reaction Intermediates ; Preparation & Properties |

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The correct order with respect to –I effect of the substituents is:
(R = alkyl)

1. –NH₂ > –OR < –F
2. –NR₂ < –OR < –F
3. –NH₂ > –OR > –F
4. –NR₂ > –OR > –F

Q5:

From NCERT NEET - 2018

Subtopic: Electron Displacement Effects |

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The most stable carbocation among the following is:

1.		2.
3.		4.

Q6:

51% From NCERT NEET - 2018

Subtopic: Electron Displacement Effects |

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Hyperconjugation occurs among the following compounds:

1.	I only	2.	II only
3.	III only	4.	I and III

Q7:

68% From NCERT NEET - 2015

Subtopic: Electron Displacement Effects |

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What is the correct sequence of acidity for the following compounds?

1.	CH₃COOH > BrCH₂COOH > ClCH₂COOH > FCH₂COOH
2.	FCH₂COOH > CH₃COOH > BrCH₂COOH > ClCH₂COOH
3.	BrCH₂COOH > ClCH₂COOH > FCH₂COOH > CH₃COOH
4.	FCH₂COOH > ClCH₂COOH > BrCH₂COOH > CH₃COOH