Question

A(n) _______ is an organic compound in which a carbonyl group is bonded to a nitrogen atom.

ester

aldehyde

amide

ketone

Answer 1

Aldehydes and ketones are simple compounds which contain a carbonyl group - a carbon-oxygen double bond.
In aldehydes, the carbonyl group has a hydrogen atom attached to it together with either
a second hydrogen atom
or, more commonly, a hydrocarbon group which might be an alkyl group or one containing a benzene ring.
RCOH

In ketones, the carbonyl group has two hydrocarbon groups attached. Again, these can be either alkyl groups or ones containing benzene rings
ROR

Esters are derived from carboxylic acids. A carboxylic acid contains the -COOH group, and in an ester the hydrogen in this group is replaced by a hydrocarbon group of some kind. This could be an alkyl group like methyl or ethyl, or one containing a benzene ring like phenyl.
RCOOR

Amides are derived from carboxylic acids. A carboxylic acid contains the -COOH group, and in an amide the -OH part of that group is replaced by an -NH2 group
R-CONH2

Answer 2

would this mean it is d?

Answer 3

i mean c

Answer 4

it's C