Question

Which aromatic ring on benzil shows up on IR?

a. Ring A
b. Ring B
c. Both A and B
d. Neither A nor B

Answer 1

Both aromatic rings (A and B) in benzil are detectable by Infrared (IR) spectroscopy, as they both have the characteristic alternating single and double carbon-carbon bonds of an aromatic benzene ring.

Step-by-step explanation:

The question is inquiring about which aromatic ring in benzil is detectable by Infrared (IR) spectroscopy. Benzil is a compound with two benzene rings. In IR spectroscopy, aromatic rings typically show characteristic absorptions due to the alternating single and double carbon-carbon (C-C) bonds, which are indicative of aromaticity. Since both rings in benzil possess these alternating C-C bonds with the benzene structure, both will be detectable by IR. Therefore, the answer is c. Both A and B.