Bond Length And Bond Energy
Easychemistry
Arrange the following bonds in order of increasing bond length: C-C, C=C, C≡C
Select the correct option:
Solution
Incorrect! Answer:
C≡C < C=C < C-C
Bond Length is inversely proportional to the Bond Order (number of shared electron pairs).
- C≡C (Triple bond, order 3) has the strongest attraction between atoms, pulling them closest (≈120 pm).
- C=C (Double bond, order 2) is longer (≈134 pm).
- C-C (Single bond, order 1) is the longest (≈154 pm).
- Order: Triple<Double<Single.
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About This Question
- Subject
- chemistry
- Chapter
- chemical bonding and molecular structure
- Topic
- bond length and bond energy
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
C≡C < C=C < C-C
Bond Length is inversely proportional to the Bond Order (number of shared electron pairs).
- C≡C (Triple bond, order 3) has the strongest attraction between atoms, pulling them closest (≈120 pm).
- C=C (Double bond, order 2) is longer (≈134 pm).
- C-C (Single bond, order 1) is the longest (≈154 pm).
- Order: Triple<Double<Single.
This easy difficulty chemistry question is from the chapter chemical bonding and molecular structure, covering the topic of bond length and bond energy. It appeared in the 2025 exam.
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