Which bond is the strongest?
a. carbon – Nitrogen triple bond
b. carbon – Nitrogen double bond
c. carbon – Hydrogen bond
d. carbon – Carbon triple bond
e. carbon – Carbon single bond
The correct answer and explanation is :
Correct Answer:
The strongest bond among the options is d. Carbon-Carbon Triple Bond (C≡C).
Explanation:
Bond strength is determined by bond dissociation energy (BDE), which is the energy required to break a bond. A higher BDE means a stronger bond. The bond strength depends on bond order, atomic interactions, and hybridization.
- Carbon-Carbon Triple Bond (C≡C)
- Bond Order: 3 (Triple bond)
- Bond Dissociation Energy: ~835 kJ/mol
- Shortest bond length and strongest due to sp hybridization, where electrons are held more tightly.
- Carbon-Nitrogen Triple Bond (C≡N)
- Bond Order: 3 (Triple bond)
- Bond Dissociation Energy: ~754 kJ/mol
- Strong but slightly weaker than C≡C due to electronegativity differences between C and N.
- Carbon-Nitrogen Double Bond (C=N)
- Bond Order: 2 (Double bond)
- Bond Dissociation Energy: ~615 kJ/mol
- Weaker than triple bonds due to fewer bonding interactions.
- Carbon-Hydrogen Bond (C-H)
- Bond Order: 1 (Single bond)
- Bond Dissociation Energy: ~410 kJ/mol
- Weaker than C≡C but relatively strong due to hydrogen’s small size.
- Carbon-Carbon Single Bond (C-C)
- Bond Order: 1 (Single bond)
- Bond Dissociation Energy: ~348 kJ/mol
- The weakest among the given choices.
Conclusion:
Since bond strength increases with bond order and shorter bond length, the C≡C bond is the strongest among the options.
Now, I will generate an image illustrating the bond strengths.
Here is an educational diagram illustrating the bond strength hierarchy among the given chemical bonds. Let me know if you need any modifications or explanations!