Which of the following compounds possesses the C-H bond with the lowest bond dissociation

Which Of The Following Compounds Possesses The Ch Bond With Chemistry Question

Which of the following compounds possesses the C-H bond with the lowest bond dissociation energy?

Options

(a) Toluene
(b) Benzene
(c) n-Pentane
(d) 2,2-Dimethylpropane

Correct Answer:

Toluene

Explanation:

Structure of Toluene:

Toluene (CHCH₃) = 85 kcal/mol

Benzene (CH) = 110 kcal/mol

n-Pentane (CHCHCHCH ) = 98 kcal/mol

2, 2-Dimathylpropane = 92 kcal/mol

Toluene has the lowest C – H bond dissociation energy compare to other three.

Toluene is a Tertiary free radical. Bond Dissociation Energy of C-H bonds decreases as we go from methyl to primary to secondary to tertiary. They are easier to break since homolytic bond cleavage results in a more stable radical. 

Related Questions:

  1. 0.037g of an alcohol, R-OH was added to C₂H₅Mgl and the has evolved measured 11.2cc
  2. Heroin is formed from …. by acetylation
  3. When CO₂ is passed through solution of calcium hydroxide,Which one of the
  4. Aniline reacts with which of these to form Schiff base
  5. HgI₂ reacts KI in aqueous solution to form K₂HgI₄.If small amount of HgI₂

Topics: Chemical Bonding and Molecular Structure (86)
Subject: Chemistry (2512)

Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score

18000+ students are using NEETLab to improve their score. What about you?

Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.

NEETLab Mobile App

Share this page with your friends

2 Comments on Which of the following compounds possesses the C-H bond with the lowest bond dissociation

Leave a Reply

Your email address will not be published.


*