Reaction Intermediates ; Preparation & Properties Recommended MCQs - 171 Questions Organic Chemistry - Some Basic Principles And Techniques Chemistry NEET Practice Questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, and PDF solved with answers

Free radical formation will take place in :

1.
2.
3.
4.

Subtopic: Reaction Intermediates ; Preparation & Properties |

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The arrangement in decreasing order of stability of $\overset{∙}{C}$ H₃, $\overset{∙}{C_{2}}$ H₅,(CH₃)₂ $\overset{∙}{C}$ H and (CH₃)₃ $\overset{∙}{C}$ free radicals is-

1. $\overset{∙}{C}$ H₃ > $\overset{∙}{C_{2}}$ H₅ > (CH₃)₂ $\overset{∙}{C}$ H > (CH₃)₃ $\overset{∙}{C}$

2. (CH₃)₃ $\overset{∙}{C}$ > (CH₃)₂ $\overset{∙}{C}$ H > $\overset{∙}{C_{2}}$ H₅ > $\overset{∙}{C}$ H₃

3. $\overset{∙}{C_{2}}$ H₅ > $\overset{∙}{C}$ H₃ > (CH₃)₂ $\overset{∙}{C}$ H > (CH₃)₃ $\overset{∙}{C}$

4. (CH₃)₃ $\overset{∙}{C}$ > (CH₃)₂ $\overset{∙}{C}$ H > $\overset{∙}{C}$ H₃> $\overset{∙}{C_{2}}$ H₅

Subtopic: Reaction Intermediates ; Preparation & Properties |

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Which carbocation is the most stable among the options provided?

1.		2.
3.		4.

Subtopic: Reaction Intermediates ; Preparation & Properties |

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The most stable carbocation among the following is:

1.		2.
3.		4.

Subtopic: Reaction Intermediates ; Preparation & Properties |

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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

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

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Which of the following statements accurately describes the stability of allyl and propyl carbocations?

1. Allyl carbocation (CH₂=CH-CH₂⁺) is more stable than propyl carbocation

2. Propyl carbocation is more stable than allyl carbocation

3. Both are equally stable

4. None of the above

Subtopic: Reaction Intermediates ; Preparation & Properties |

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The species that contains only three pairs of electrons among the following is-

1.	Carbocation	2.	Carbanion
3.	Free radical	4.	None of the above

Subtopic: Reaction Intermediates ; Preparation & Properties |

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Which of the following species exhibits paramagnetism?

1.	A carbocation	2.	A free radical
3.	A carbanion ion	4.	All of the above

Subtopic: Reaction Intermediates ; Preparation & Properties |

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The decreasing order of the stability of the given ions is-

(I).		(II).
(III).

1.	I>II>III	2.	II>III>I
3.	III>I>II	4.	II>I>III

Subtopic: Reaction Intermediates ; Preparation & Properties |

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The compound that gives the most stable carbonium ion after C- Cl bond ionisation among the following is-

1.		2.
3.		4.

Subtopic: Reaction Intermediates ; Preparation & Properties |

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