Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
+1 vote
74 views
in Chemistry by (74.4k points)
closed by
The bond dissociation of `C=C` in ethene is
A. `63 kcal mol^(-1)`
B. `146 kcal mol^(-1)`
C. `88 kcal mol^(-1)`
D. `95 kcal mol^(-1)`

1 Answer

0 votes
by (74.7k points)
selected by
 
Best answer
Correct Answer - B
The `C=C` bond of ethene has the greater bond dissociation energy `(146 kcal mol^(-))` compared to the `C-C` bond of ethane `(88 kcal mol^(-1))` because with `C=C`, two bonds are broken and with `CoC`, only one. In spite of the greater bond dissociation energy of the double bond, alkenes are more reactive than alkanes beacuse in most reactions, only `pi` bond is broken. Its bond dissociation energy of `51 kcal mol^(-1)` is less than bond dissociation energy of `C-C sigma` bond of ethane.

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...