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Which of the following statements is not correct for sigma and pi-bonds formed between two carbon atoms? [2003]
- a)Sigma-bond deter mines the directi on between carbon atoms but a pi-bond has no primary effect in this regard
- b)Sigma-bond is stronger than a pi-bond
- c)Bond energies of sigma- and pi-bonds are of the order of 264 kJ/mol and 347 kJ/mol, respectively
- d)Free rotation of atoms about a sigma-bond is allowed but not in case of a pi-bond
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Which of the following statements is not correct for sigma and pi-bond...
As sigma bond is stronger than the π(pi) bond, so it must be having higher bond energy than π (pi) bond.
Most Upvoted Answer
Which of the following statements is not correct for sigma and pi-bond...
Sigma and Pi Bonds between Carbon Atoms
Introduction:
In organic chemistry, carbon atoms can form different types of bonds, including sigma (σ) bonds and pi (π) bonds. These bonds play a fundamental role in determining the structure and properties of organic compounds.
Sigma Bond:
A sigma bond is formed by the overlap of atomic orbitals along the internuclear axis. It allows free rotation of atoms about the bond axis. The sigma bond is stronger than a pi bond. Hence, option (b) is correct.
Pi Bond:
A pi bond is formed by the sideways overlap of p-orbitals that are perpendicular to the internuclear axis. It is formed in addition to the sigma bond between two carbon atoms in a double or triple bond. Pi bonds are responsible for the delocalization of electrons and contribute to the stability of molecules.
Effect on Direction:
The sigma bond determines the direction between carbon atoms because it is formed by the head-on overlap of orbitals along the bond axis. In contrast, the pi bond has no primary effect on the direction between carbon atoms. Therefore, option (a) is incorrect.
Bond Energies:
The bond energies of sigma and pi bonds between carbon atoms are different. However, the values provided in option (c) are incorrect. The bond energies of sigma and pi bonds are approximately 347 kJ/mol and 264 kJ/mol, respectively. Therefore, option (c) is not correct.
Free Rotation:
Free rotation of atoms about a sigma bond is allowed because it involves the continuous overlap of orbitals along the bond axis. On the other hand, free rotation is not possible around a pi bond due to the sideways overlap of p-orbitals. Hence, option (d) is correct.
Conclusion:
In summary, the correct statement regarding sigma and pi bonds between carbon atoms is that the sigma bond determines the direction between carbon atoms, while the pi bond has no primary effect in this regard. The sigma bond is stronger than the pi bond, and free rotation of atoms is allowed around a sigma bond but not around a pi bond. However, the bond energies provided in option (c) are incorrect.
Introduction:
In organic chemistry, carbon atoms can form different types of bonds, including sigma (σ) bonds and pi (π) bonds. These bonds play a fundamental role in determining the structure and properties of organic compounds.
Sigma Bond:
A sigma bond is formed by the overlap of atomic orbitals along the internuclear axis. It allows free rotation of atoms about the bond axis. The sigma bond is stronger than a pi bond. Hence, option (b) is correct.
Pi Bond:
A pi bond is formed by the sideways overlap of p-orbitals that are perpendicular to the internuclear axis. It is formed in addition to the sigma bond between two carbon atoms in a double or triple bond. Pi bonds are responsible for the delocalization of electrons and contribute to the stability of molecules.
Effect on Direction:
The sigma bond determines the direction between carbon atoms because it is formed by the head-on overlap of orbitals along the bond axis. In contrast, the pi bond has no primary effect on the direction between carbon atoms. Therefore, option (a) is incorrect.
Bond Energies:
The bond energies of sigma and pi bonds between carbon atoms are different. However, the values provided in option (c) are incorrect. The bond energies of sigma and pi bonds are approximately 347 kJ/mol and 264 kJ/mol, respectively. Therefore, option (c) is not correct.
Free Rotation:
Free rotation of atoms about a sigma bond is allowed because it involves the continuous overlap of orbitals along the bond axis. On the other hand, free rotation is not possible around a pi bond due to the sideways overlap of p-orbitals. Hence, option (d) is correct.
Conclusion:
In summary, the correct statement regarding sigma and pi bonds between carbon atoms is that the sigma bond determines the direction between carbon atoms, while the pi bond has no primary effect in this regard. The sigma bond is stronger than the pi bond, and free rotation of atoms is allowed around a sigma bond but not around a pi bond. However, the bond energies provided in option (c) are incorrect.
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Which of the following statements is not correct for sigma and pi-bonds formed between two carbon atoms? [2003]a)Sigma-bond deter mines the directi on between carbon atoms but a pi-bond has no primary effect in this regardb)Sigma-bond is stronger than a pi-bondc)Bond energies of sigma- and pi-bonds are of the order of 264 kJ/mol and 347 kJ/mol, respectivelyd)Free rotation of atoms about a sigma-bond is allowed but not in case of a pi-bondCorrect answer is option 'C'. Can you explain this answer?
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Which of the following statements is not correct for sigma and pi-bonds formed between two carbon atoms? [2003]a)Sigma-bond deter mines the directi on between carbon atoms but a pi-bond has no primary effect in this regardb)Sigma-bond is stronger than a pi-bondc)Bond energies of sigma- and pi-bonds are of the order of 264 kJ/mol and 347 kJ/mol, respectivelyd)Free rotation of atoms about a sigma-bond is allowed but not in case of a pi-bondCorrect answer is option 'C'. Can you explain this answer? for Class 11 2025 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about Which of the following statements is not correct for sigma and pi-bonds formed between two carbon atoms? [2003]a)Sigma-bond deter mines the directi on between carbon atoms but a pi-bond has no primary effect in this regardb)Sigma-bond is stronger than a pi-bondc)Bond energies of sigma- and pi-bonds are of the order of 264 kJ/mol and 347 kJ/mol, respectivelyd)Free rotation of atoms about a sigma-bond is allowed but not in case of a pi-bondCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 11 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements is not correct for sigma and pi-bonds formed between two carbon atoms? [2003]a)Sigma-bond deter mines the directi on between carbon atoms but a pi-bond has no primary effect in this regardb)Sigma-bond is stronger than a pi-bondc)Bond energies of sigma- and pi-bonds are of the order of 264 kJ/mol and 347 kJ/mol, respectivelyd)Free rotation of atoms about a sigma-bond is allowed but not in case of a pi-bondCorrect answer is option 'C'. Can you explain this answer?.
Which of the following statements is not correct for sigma and pi-bonds formed between two carbon atoms? [2003]a)Sigma-bond deter mines the directi on between carbon atoms but a pi-bond has no primary effect in this regardb)Sigma-bond is stronger than a pi-bondc)Bond energies of sigma- and pi-bonds are of the order of 264 kJ/mol and 347 kJ/mol, respectivelyd)Free rotation of atoms about a sigma-bond is allowed but not in case of a pi-bondCorrect answer is option 'C'. Can you explain this answer? for Class 11 2025 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about Which of the following statements is not correct for sigma and pi-bonds formed between two carbon atoms? [2003]a)Sigma-bond deter mines the directi on between carbon atoms but a pi-bond has no primary effect in this regardb)Sigma-bond is stronger than a pi-bondc)Bond energies of sigma- and pi-bonds are of the order of 264 kJ/mol and 347 kJ/mol, respectivelyd)Free rotation of atoms about a sigma-bond is allowed but not in case of a pi-bondCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 11 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements is not correct for sigma and pi-bonds formed between two carbon atoms? [2003]a)Sigma-bond deter mines the directi on between carbon atoms but a pi-bond has no primary effect in this regardb)Sigma-bond is stronger than a pi-bondc)Bond energies of sigma- and pi-bonds are of the order of 264 kJ/mol and 347 kJ/mol, respectivelyd)Free rotation of atoms about a sigma-bond is allowed but not in case of a pi-bondCorrect answer is option 'C'. Can you explain this answer?.
Solutions for Which of the following statements is not correct for sigma and pi-bonds formed between two carbon atoms? [2003]a)Sigma-bond deter mines the directi on between carbon atoms but a pi-bond has no primary effect in this regardb)Sigma-bond is stronger than a pi-bondc)Bond energies of sigma- and pi-bonds are of the order of 264 kJ/mol and 347 kJ/mol, respectivelyd)Free rotation of atoms about a sigma-bond is allowed but not in case of a pi-bondCorrect answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 11.
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Which of the following statements is not correct for sigma and pi-bonds formed between two carbon atoms? [2003]a)Sigma-bond deter mines the directi on between carbon atoms but a pi-bond has no primary effect in this regardb)Sigma-bond is stronger than a pi-bondc)Bond energies of sigma- and pi-bonds are of the order of 264 kJ/mol and 347 kJ/mol, respectivelyd)Free rotation of atoms about a sigma-bond is allowed but not in case of a pi-bondCorrect answer is option 'C'. Can you explain this answer?, a detailed solution for Which of the following statements is not correct for sigma and pi-bonds formed between two carbon atoms? [2003]a)Sigma-bond deter mines the directi on between carbon atoms but a pi-bond has no primary effect in this regardb)Sigma-bond is stronger than a pi-bondc)Bond energies of sigma- and pi-bonds are of the order of 264 kJ/mol and 347 kJ/mol, respectivelyd)Free rotation of atoms about a sigma-bond is allowed but not in case of a pi-bondCorrect answer is option 'C'. Can you explain this answer? has been provided alongside types of Which of the following statements is not correct for sigma and pi-bonds formed between two carbon atoms? [2003]a)Sigma-bond deter mines the directi on between carbon atoms but a pi-bond has no primary effect in this regardb)Sigma-bond is stronger than a pi-bondc)Bond energies of sigma- and pi-bonds are of the order of 264 kJ/mol and 347 kJ/mol, respectivelyd)Free rotation of atoms about a sigma-bond is allowed but not in case of a pi-bondCorrect answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Which of the following statements is not correct for sigma and pi-bonds formed between two carbon atoms? [2003]a)Sigma-bond deter mines the directi on between carbon atoms but a pi-bond has no primary effect in this regardb)Sigma-bond is stronger than a pi-bondc)Bond energies of sigma- and pi-bonds are of the order of 264 kJ/mol and 347 kJ/mol, respectivelyd)Free rotation of atoms about a sigma-bond is allowed but not in case of a pi-bondCorrect answer is option 'C'. Can you explain this answer? tests, examples and also practice Class 11 tests.
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