Question:
Identify the correctly matched pair from the following:
Identify the correctly matched pair from the following:
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The bond lengths in molecules like benzene are affected by resonance, which makes the C-C bond length shorter than that of a typical single bond and longer than that of a double bond.
Updated On: June 02, 2025
- C-C ------- 120 pm
- C=C ------- 110 pm
- C=C ------- 154 pm
- C-C Bond length in Benzene ------- 139 pm
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The Correct Option is D
Solution and Explanation
- The bond length of a C-C single bond in a molecule like ethane is approximately 154 pm, so option (1) is incorrect.
- The bond length of a C=C double bond is around 133 pm (not 110 pm), so option (2) is incorrect.
- The bond length of a C=C double bond in alkynes and alkenes is generally about 134 pm, not 154 pm, making option (3) incorrect.
- In benzene, due to resonance, the C-C bond length is intermediate, around 139 pm. Hence, option (4) is correct.
- The bond length of a C=C double bond is around 133 pm (not 110 pm), so option (2) is incorrect.
- The bond length of a C=C double bond in alkynes and alkenes is generally about 134 pm, not 154 pm, making option (3) incorrect.
- In benzene, due to resonance, the C-C bond length is intermediate, around 139 pm. Hence, option (4) is correct.
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