Below is a molecule of caffeine. Which of the following features are not present in a molecule of caffeine?
A) a carbonyl group
B) a carboxyl group
C) a methyl group
D) a double bond

Question

Below is a molecule of caffeine. Which of the following features are not present in a molecule of caffeine? 
A) a carbonyl group 
B) a carboxyl group 
C) a methyl group 
D) a double bond

Quizplus · Accepted Answer

A carboxyl group (-COOH) is not present in caffeine. Caffeine has a methyl group (-CH3) at multiple positions, a carbonyl group (-C=O) and double bonds (-C=C-).

Below Is a Molecule of Caffeine