Question

The combination of a carbonyl group and a hydroxyl group on the same carbon atom is called a ________ group.

a. carbamate group
b. carbonate
c. carboxlate
d. carboxyl

Answer 1

d. carboxyl

Step-by-step explanation:

The presence of carbonyl group (>C=O)) and a hydroxyl group ( (−OH) on the same carbon atom is called a "carboxyl" group. A carboxyl group is represented as COOH and acts as the functional group part of carboxylic acids.

For example:

• Formic acid or Methanoic acid (H-COOH)
• Butanoic acid (C3H7-COOH)

Hence, the correct option is "d. carboxyl ".