Question

Q.2. Which of the transition has lowest energy:
(a) Vibrational
O (b) Rotational
(c) Electronics
(d) Vibrational rotational​

Answer 1

Explanation:

The energy requirement order for excitation for different transitions is as follows. n→∏* transition requires lowest energy while σ→σ* requires highest amount of energy. n→π* transition requires lowest energy due to longer wavelength.