Live Quiz Arena
🎁 1 Free Round Daily
⚡ Enter ArenaQuestion
← ScienceWhich mechanism causes increased single bond rotational freedom between carbon atoms in ethane following ultraviolet (UV) photon absorption?
A)Antibonding molecular orbital occupation✓
B)Increased nuclear spin alignment
C)Sigma (σ) bond order increase
D)Hybridization state stabilization effect
💡 Explanation
Occupation of antibonding molecular orbitals weakens the sigma (σ) bond because electron density reduces between the carbon nuclei, therefore, favoring bond rotation rather than restricted torsion. Increased freedom is due to weakened bonding, rather than increased attraction or stabilization.
🏆 Up to £1,000 monthly prize pool
Ready for the live challenge? Join the next global round now.
*Terms apply. Skill-based competition.
Related Questions
Browse Science →- Which mechanism initiates stall in accelerating aircraft wings?
- Which consequence results when a polymer's side chains hinder chain folding?
- Which outcome occurs when a high-frequency alternating current flows through a planar inductor near a metal surface?
- Which mechanism causes perceived duration changes near black holes?
- Which distortion occurs to spacetime when approaching singularities?
- Which risk increases when excessive pressure affects a crystal lattice?