Class 11 Exam > Class 11 Questions > Which statement is NOT correct ? [1990]a)A si...
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Which statement is NOT correct ? [1990]
- a)A sigma bond is weaker than a π -bond.
- b)A sigma bond is stronger than a π -bond.
- c)A double bond is stronger than a single bond.
- d)A double bond is shorter than a single bond.
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Which statement is NOT correct ? [1990]a)A sigma bond is weaker than a...
A σ - bond is stronger than a σ -bond hence option (a) is not correct. Sigma (σ) bonds are formed by head on overlap of unhybridised s–s, p–p or s–p orbitals and hybridised orbitals (sp, sp2, sp3, sp3d and sp3d2) hence σ bonds are strong bonds. Where as Pi (π)-bonds are formed by side ways overlap of unhybridised p- and d orbitals-hence σ bonds are weak bonds.
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Which statement is NOT correct ? [1990]a)A sigma bond is weaker than a...
Understanding Sigma and Pi Bonds
A sigma (σ) bond and a pi (π) bond are two types of covalent bonds that differ in their formation and strength.
Strength of Sigma vs. Pi Bonds
- Sigma bonds are formed by the head-on overlap of atomic orbitals.
- Pi bonds are formed by the side-to-side overlap of atomic orbitals.
- Sigma bonds are generally stronger than pi bonds due to the direct overlap, which allows for a greater electron density between the nuclei of the bonding atoms.
Analysis of Statement A
- Statement A claims that a sigma bond is weaker than a pi bond.
- This statement is incorrect because, as discussed, sigma bonds are stronger due to the nature of their orbital overlap.
Comparison of Single and Double Bonds
- A double bond consists of one sigma bond and one pi bond, making it stronger than a single bond (which consists only of a sigma bond).
- Consequently, a double bond is not only stronger but also shorter than a single bond, due to the additional attraction from the pi bond.
Summary of Correct Statements
- Statement B (Sigma bond is stronger than a pi bond) is correct.
- Statement C (A double bond is stronger than a single bond) is correct.
- Statement D (A double bond is shorter than a single bond) is also correct.
Conclusion
In summary, the incorrect statement is option A, as sigma bonds are indeed stronger than pi bonds, contradicting the claim made in that statement. Understanding these bond types is crucial in grasping the fundamentals of molecular structure and stability.
A sigma (σ) bond and a pi (π) bond are two types of covalent bonds that differ in their formation and strength.
Strength of Sigma vs. Pi Bonds
- Sigma bonds are formed by the head-on overlap of atomic orbitals.
- Pi bonds are formed by the side-to-side overlap of atomic orbitals.
- Sigma bonds are generally stronger than pi bonds due to the direct overlap, which allows for a greater electron density between the nuclei of the bonding atoms.
Analysis of Statement A
- Statement A claims that a sigma bond is weaker than a pi bond.
- This statement is incorrect because, as discussed, sigma bonds are stronger due to the nature of their orbital overlap.
Comparison of Single and Double Bonds
- A double bond consists of one sigma bond and one pi bond, making it stronger than a single bond (which consists only of a sigma bond).
- Consequently, a double bond is not only stronger but also shorter than a single bond, due to the additional attraction from the pi bond.
Summary of Correct Statements
- Statement B (Sigma bond is stronger than a pi bond) is correct.
- Statement C (A double bond is stronger than a single bond) is correct.
- Statement D (A double bond is shorter than a single bond) is also correct.
Conclusion
In summary, the incorrect statement is option A, as sigma bonds are indeed stronger than pi bonds, contradicting the claim made in that statement. Understanding these bond types is crucial in grasping the fundamentals of molecular structure and stability.
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Which statement is NOT correct ? [1990]a)A sigma bond is weaker than a π -bond.b)A sigma bond is stronger than aπ -bond.c)A double bond is stronger than a single bond.d)A double bond is shorter than a single bond.Correct answer is option 'A'. 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 statement is NOT correct ? [1990]a)A sigma bond is weaker than a π -bond.b)A sigma bond is stronger than aπ -bond.c)A double bond is stronger than a single bond.d)A double bond is shorter than a single bond.Correct answer is option 'A'. 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 statement is NOT correct ? [1990]a)A sigma bond is weaker than a π -bond.b)A sigma bond is stronger than aπ -bond.c)A double bond is stronger than a single bond.d)A double bond is shorter than a single bond.Correct answer is option 'A'. Can you explain this answer?.
Which statement is NOT correct ? [1990]a)A sigma bond is weaker than a π -bond.b)A sigma bond is stronger than aπ -bond.c)A double bond is stronger than a single bond.d)A double bond is shorter than a single bond.Correct answer is option 'A'. 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 statement is NOT correct ? [1990]a)A sigma bond is weaker than a π -bond.b)A sigma bond is stronger than aπ -bond.c)A double bond is stronger than a single bond.d)A double bond is shorter than a single bond.Correct answer is option 'A'. 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 statement is NOT correct ? [1990]a)A sigma bond is weaker than a π -bond.b)A sigma bond is stronger than aπ -bond.c)A double bond is stronger than a single bond.d)A double bond is shorter than a single bond.Correct answer is option 'A'. Can you explain this answer?.
Solutions for Which statement is NOT correct ? [1990]a)A sigma bond is weaker than a π -bond.b)A sigma bond is stronger than aπ -bond.c)A double bond is stronger than a single bond.d)A double bond is shorter than a single bond.Correct answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 11.
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Which statement is NOT correct ? [1990]a)A sigma bond is weaker than a π -bond.b)A sigma bond is stronger than aπ -bond.c)A double bond is stronger than a single bond.d)A double bond is shorter than a single bond.Correct answer is option 'A'. Can you explain this answer?, a detailed solution for Which statement is NOT correct ? [1990]a)A sigma bond is weaker than a π -bond.b)A sigma bond is stronger than aπ -bond.c)A double bond is stronger than a single bond.d)A double bond is shorter than a single bond.Correct answer is option 'A'. Can you explain this answer? has been provided alongside types of Which statement is NOT correct ? [1990]a)A sigma bond is weaker than a π -bond.b)A sigma bond is stronger than aπ -bond.c)A double bond is stronger than a single bond.d)A double bond is shorter than a single bond.Correct answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
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