Question

Which one of the following statements is WRONG?

• A. A singlet or triplet state may result when one of the electrons from the HOMO is excited to higher energy levels
• B. In an excited singlet state, the spins of the electrons in the higher energy orbital is paired with the electron in the ground state orbital
• C. Triplet excited state is more stable than the singlet excited state
• D. When the electron from the singlet excited state, the molecule always shows fluorescence phenomenon

Answer 1

Answer: (C)

The triplet state is more unstable than the singlet state because it has more unpaired electron. The triplet state has three unpaired electrons. The triplet state is also lower in energy than the singlet state.