Question

Which of the following would show the largest wavelength in the UV spectrum? Justify your answer.

Answer 1

red because it's scarcity is least

VIBGYOR

Answer 2

Welcome dear,

● Answer -

Compound (c) 2-cyclohexane-1,4-dione

● Justification -

• Conjugation increases wavelength of light absorbed by compound.
• Presence of 2 ketone groups in 2-cyclohexane-1,4-dione increases conjugation.
• Conjugation decreases energy, thus wavelength absorbed is increased.
• Therefore, 1,4-cyclohexanedione shows largest wavelength in UV spectrum.

Hope this helps you. Thanks for asking questions..