-
Engineering and Architecture
Exams
Colleges
Predictors
Resources
-
Computer Application and IT
Quick Links
Colleges
-
Pharmacy
Colleges
Resources
-
Hospitality and Tourism
Colleges
Resources
Diploma Colleges
-
Competition
Other Exams
Resources
-
School
Exams
Top Schools
Products & Resources
-
Study Abroad
Top Countries
Resources
-
Arts, Commerce & Sciences
Colleges
Upcoming Events
Resources
-
Management and Business Administration
Exams
Colleges & Courses
Predictors
-
Learn
Law Preparation
MBA Preparation
Engineering Preparation
Medical Preparation
-
Online Courses and Certifications
Top Streams
Specializations
- Digital Marketing Certification Courses
- Cyber Security Certification Courses
- Artificial Intelligence Certification Courses
- Business Analytics Certification Courses
- Data Science Certification Courses
- Cloud Computing Certification Courses
- Machine Learning Certification Courses
- View All Certification Courses
Resources
-
Medicine and Allied Sciences
Colleges
Predictors
Resources
-
Law
Resources
Colleges
-
Animation and Design
Exams
Predictors & Articles
Colleges
Resources
-
Media, Mass Communication and Journalism
Colleges
Resources
-
Finance & Accounts
Top Courses & Careers
Colleges
Bond Parameters: length, angle, energy, strength - (Concept)
Bond length
It is the distance between the nuclei of two bonded atoms when the lowest potential energy between the atoms is achieved.
Bond angle
It is the angle between any two covalent bonds that share a common atom as shown in figure.
Bond distances (lengths) and angles are shown for the formaldehyde molecule, H2CO.
Bond energy
It is the energy required to break one mole of bonds between two atoms in a gaseous state. For example, the bond enthalpy of H-H bond is 435.8 kJ/mol.
$\mathrm{H}_2(\mathrm{~g}) \rightarrow \mathrm{H}(\mathrm{g})+\mathrm{H}(\mathrm{g}): \Delta_{\mathrm{a}} \mathrm{H}^{\prime}=435.8 \mathrm{kJmol}^{-1}$
Bond Strength
It is the strength by which the bonded atoms are held together in a molecule. It is measured in terms of the bond energy, in other words, it is the amount of energy required to break the bond.
|
Average Bond Lengths and Bond Energies for Some Common Bonds |
||
|
Bond |
Bond Length (Å) |
Bond Energy (kJ/mol) |
|
C–C |
1.54 |
345 |
|
C=C |
1.34 |
611 |
|
C≡C |
1.20 |
837 |
|
C–N |
1.43 |
290 |
|
C=N |
1.38 |
615 |
|
C≡N |
1.16 |
891 |
|
C–O |
1.43 |
350 |
|
C=O |
1.23 |
741 |
|
C≡O |
1.13 |
1080 |
| Exam | Chapter |
| JEE MAIN | Chemical Bonding and Molecular Structure |
For the compounds CH3Cl, CH3Br, CH3I, and CH3F,
the correct order of increasing C-halogen bond length is :
| A. |
|
| B. |
|
| C. |
|
| D. |
|
The correct order of the $\mathrm{O}-\mathrm{O}$ bond length in $\mathrm{O}_2, \mathrm{H}_2 \mathrm{O}_2$ and $\mathrm{O}_3$.
| A. |
|
| B. |
|
| C. |
|
| D. |
|
As the S- character of a hybrid orbital decreases
| A. |
|
| B. |
|
| C. |
|
| D. |
|
The H-P-H angle in PH3 is smaller than that H-N-H angle in NH3 because:
| A. |
|
| B. |
|
| C. |
|
| D. |
|
The molecule having highest bond energy.
| A. |
|
| B. |
|
| C. |
|
| D. |
|
Arrange the following bonds according to their average bond energies in descending order :
$C-C l, C-B r, C-F, C-I$
| A. |
|
| B. |
|
| C. |
|
| D. |
|
The interatomic distances in H2 and Cl2 molecules are 74 and 198 pm, respectively. The bond length of HCl in ppm is
| A. |
|
| B. |
|
| C. |
|
| D. |
|
Which of the following has the shortest bond length?
| A. |
|
| B. |
|
| C. |
|
| D. |
|
Which among the following species has unequal bond lengths ?
| A. |
|
| B. |
|
| C. |
|
| D. |
|
In gaseous triethyl amine the "$-\mathrm{C}-\mathrm{N}-\mathrm{C}-$" bond angle is ________degree.
| A. |
|
| B. |
|
| C. |
|
| D. |
|
Which of the following statements is wrong?
| A. |
|
| B. |
|
| C. |
|
| D. |
|
TEST
| A. |
|
| B. |
|
| C. |
|
| D. |
|
Which option best describes the bond angle present in $\mathrm{H}_2 \mathrm{Se}$ and $\mathrm{PH}_3 ?$
| A. |
|
| B. |
|
| C. |
|
| D. |
|
The longest and shortest bond length respectively corresponds to -
| A. |
|
| B. |
|
| C. |
|
| D. |
|
Find out the ratio of $\sigma \& \pi$ bonds in phenanthrene is 26:n. Find the value of n?
| A. |
|
| B. |
|
| C. |
|
| D. |
|
Which of the following order is correct that describes bond strength
| A. |
|
| B. |
|
| C. |
|
| D. |
|
The $\mathrm{C}-\mathrm{O}$ bond length in $\mathrm{CO}, \mathrm{CO}_2$ and $\mathrm{CO}_3^{2-}$ follows the order
| A. |
|
| B. |
|
| C. |
|
| D. |
|
Which one of the following has highest C-N bond length
| A. |
|
| B. |
|
| C. |
|
| D. |
|
The maximum covalency of a non-metallic group
15 element 'E' with weakest E–E bond is :
| A. |
|
| B. |
|
| C. |
|
| D. |
|
The bond angle in ethylene is _____ $^{\circ}$
| A. |
|
| B. |
|
| C. |
|
| D. |
|
The C-C bond length is shortest in
| A. |
|
| B. |
|
| C. |
|
| D. |
|
In which of the following molecules/ions are all the bonds not equal?
| A. |
|
| B. |
|
| C. |
|
| D. |
|
The correct order of bond angles (smallest first ) in $\mathrm{H}_2 \mathrm{~S}, \mathrm{NH}_3, \mathrm{BF}_3$, and $\mathrm{SiH}_4$ is
| A. |
|
| B. |
|
| C. |
|
| D. |
|
Among the following molecules, the number of molecule(s) in which all the bond lengths are not equal is:
$\mathrm{PCl}_5, \mathrm{SF}_4, \mathrm{ClF}_3, \mathrm{XeF}_2,\left[\mathrm{XeF}_3\right]^{+}, \mathrm{O}_3, \mathrm{P}_4$ (white)
| A. |
|
| B. |
|
| C. |
|
| D. |
|
In which of the following sets, the species given are arranged in an increasing order of the bond order values?
| A. |
|
| B. |
|
| C. |
|
| D. |
|
In which of the following the correct order of the property mentioned is given
| A. |
|
| B. |
|
| C. |
|
| D. |
|
Bond length is defined as the equilibrium distance between the nuclei of two bonded atoms in a molecule.
