Question

In ________ functional group oxygen is absent.​

Answer 1

Answer:

Aldehydes,ketones, carboxylic acid ,esters and ethers have oxygen containing functional groups. IUPAC naming can be used for Aldehydes, ketone, carboxylic acid, and esters and ether containing molecules.

Hope this helpful to you

Answer 2

Answer:

alkyl halide or haloalkane functional group in which oxygen is absent

Explanation:

When the carbon of an alkane is bonded to one or more halogens, the group is referred to as a alkyl halide or haloalkane.

The presence of a halogen atom (F, Cl, Br, or I), is often represented by X due to the similar chemistry of halogens. Chloroform is a useful solvent in the laboratory, and was one of the earlier anesthetic drugs used in surgery.

Chlorodifluoromethane was used as a refrigerant and in aerosol sprays until the late twentieth century, but its use was discontinued after it was found to have harmful effects on the ozone layer.

Bromoethane is a simple alkyl halide often used in organic synthesis. Alkyl halides groups are quite rare in biomolecules.