15 public questions tagged with this topic.
I₂ has a single bond with a length of 267 pm, longer than Cl₂ (199 pm), F₂ (144 pm), or H₂ (74 pm) due to larger atomic size. This follows from NCERT principle where relation explains outcome clearly for students.
Ref: NCERT Chemistry Textbook for Class XI and XII, Chapter: Some Basic Concepts, Structure of Atom, Periodicity and relevant Chemistry topic, Topic: Mole concept and periodic trends.
Bond length increases with the size of the halogen. Among F, Cl, Br, and I, iodine is the largest, so CH₃-I has the longest C-X bond.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Nature of C-X Bond and Methods of Preparation
Bond length decreases with smaller halogen size. CH₃F has the shortest C-X bond due to fluorine's small atomic radius.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Nature of C-X Bond and Methods of Preparation
In C₂H₄ (ethene), the C=C double bond has a bond length of ~134 pm, typical for carbon-carbon double bonds.
Ref: NCERT Class 11 Chemistry > Chapter 4: Chemical Bonding and Molecular Structure > Topic: Valence Bond Theory and Hybridisation - sp sp2 sp3 dsp2
In CO₂ , each C=O double bond has a bond length of ~123 pm, shorter than C=C in ethene (134 pm) due to higher bond strength.
Ref: NCERT Class 11 Chemistry > Chapter 4: Chemical Bonding and Molecular Structure > Topic: Valence Bond Theory and Hybridisation - sp sp2 sp3 dsp2
In C₂H₆ (ethane), the C-C single bond has a bond length of ~154 pm, typical for carbon-carbon single bonds.
Ref: NCERT Class 11 Chemistry > Chapter 4: Chemical Bonding and Molecular Structure > Topic: Valence Bond Theory and Hybridisation - sp sp2 sp3 dsp2
I₂ has a single bond with a bond length of ~267 pm, longer than F₂ (142 pm), Cl₂ (199 pm), or Br₂ (228 pm) due to larger atomic size.
Ref: NCERT Class 11 Chemistry > Chapter 4: Chemical Bonding and Molecular Structure > Topic: Kossel-Lewis Approach and Octet Rule and Lewis Structures
In C₂H₂ (ethyne), the C#C triple bond has a bond length of ~120 pm, shorter than typical double or single bonds.
Ref: NCERT Class 11 Chemistry > Chapter 4: Chemical Bonding and Molecular Structure > Topic: Ionic Bonding - Lattice Enthalpy and Properties of Ionic Compounds
The average bond length of a C=C double bond, as in ethene, is ~134 pm due to increased electron density from two shared pairs, shorter than a C-C single bond (~154 pm) but longer than a C#C triple bond (~120 pm).
Ref: NCERT Class 11 Chemistry > Chapter 4: Chemical Bonding and Molecular Structure > Topic: Ionic Bonding - Lattice Enthalpy and Properties of Ionic Compounds
N₂ has a triple bond with a bond length of ~110 pm, shorter than O₂ ’s double bond (121 pm) due to higher bond order (3 vs. 2).
Ref: NCERT Class 11 Chemistry > Chapter 4: Chemical Bonding and Molecular Structure > Topic: Covalent Bonding - Bond Parameters and Polarity and Fajan's Rule
N₂ has a triple bond (bond order 3), resulting in the shortest bond length (~110 pm) due to greater electron density pulling the nuclei closer.
Ref: NCERT Class 11 Chemistry > Chapter 4: Chemical Bonding and Molecular Structure > Topic: Covalent Bonding - Bond Parameters and Polarity and Fajan's Rule
N₂ has a triple bond with a bond length of ~110 pm, shorter than C₂H₂ (120 pm) or CO (113 pm in MO context) due to high bond order and small atomic size.
Ref: NCERT Class 11 Chemistry > Chapter 4: Chemical Bonding and Molecular Structure > Topic: Covalent Bonding - Bond Parameters and Polarity and Fajan's Rule
