There are many. Aldehydes, ketones, carboxylic acids, amides, esters, acid anhydrides and organo-metallic compounds such as Iron Pentacarbonyl etc contain the -C=O group.
Sugars.
None. The carbonyl group is C=O. In a ketone it is bonded to two R-groups (most likely two carbons.)
The fatty acids have carboxylic group 'COOH' at terminal this is a group having 'OH' group attached to carbonyl carbon but it is not alcohol.
No, a hydroxyl group is different than a carbonyl group. A hydroxyl group is an O-H group, while a carbonyl group is a C=O (double bond) group. Perhaps you are thinking of a carboxyl group, which is a sort of hybrid of the 2 groups. Carboxyl groups are C-O-O-H, essentially a merge of the hydroxyl and carbonyl groups.
The core of a carbonyl group is a carbon (C) with a double bond to an oxygen (O). The C will have two single bonds to the rest of the molecule.
the replacement of the - OH of a carboxyl group with hydrogen
The carbonyl group exist in ketones, aldehydes, esters etc.
sugar
no,carbonyl group consist of carbon and oxygen
PROTEINS
Amino acids
proteins
None. The carbonyl group is C=O. In a ketone it is bonded to two R-groups (most likely two carbons.)
These compounds are called amines.
carbonyl group
No. Ethanol contains a hydroxyl group, but not a carbonyl group.
Formaldehyde, as its name implies, is an aldehyde. Thus, it contains a carbonyl (CHO) functional group. This group consists of a carbon atom double bonded to an oxygen atom. The carbonyl group is the only functional group contained in formaldehyde.
Esters contain a carbonyl group ( C == O ) on the Carbon adjacent to the Oxygen.