Question

Mention the functional group which always occurs at the terminal position of the carbon chain of a organic compound

Answer 1

Functional group is a group that occurs at the end of carbon chain which defines the property of the of the carbon chain. 

To be eligible as a a end functional group,
- it must be attached to the end carbon of the chain. If the group is not at the end Carbon, then it can again attach in the chain and cannot be a end group
- it must have the carbonyl group
- Keep in mind that functional group can attach to other functional group by removing atoms from the other group which is refers to as "Substitution reaction"
- Per the standard definition taken from textbooks "Functional group can be any specific atoms, ions, or groups of atoms which has uniform and consistent properties". 

Some example of commonly occuring functional groups are
- Aldehyde
- Alkane
- Alcohol
- Acyl Halide

If this helps, please mark as Brainliest. 

Answer 2

A functional group is a unique group of atoms in a molecule that is responsible for the specific chemical reactions of that molecule.
Aldehyde group (-CHO) and the Carboxyl group (-COOH) are the functional groups that always occur at the terminal position in a carbon chain. That's why they are given highest priority in specifying their names e.g. nomenclature.