Question

The functional group in alcohol is:
(A) \[ - CO{O^ - }\]
(B) \[ - COOH\]
(C) \[ - OH\]
(D) \[ - CHO\]

Answer 1

Hint: In order to find the functional group of alcohol, we must first know what is the role of the functional group in a chemical compound. The functional group are certain specific substituents that are present in the molecule which are responsible for the chemical reactions that are taking place in the molecule.

Complete Solution :
- The functional groups are the groups of one or more atoms that are combined in order to give the chemical compounds certain properties. The functional group will be having the same effect on the molecule whether it is small or big. The atoms that are present in the functional group will be attached to each other through a covalent bond.
- Now, let us discuss the different functional groups which are provided to us.
- Discussing option (A), \[ - CO{O^ - }\] the functional group is carboxylate ion. The functional group is anionic in nature and turns the molecule into a polyatomic ion or a complex ion.

- Discussing option (B), \[ - COOH\] is the functional group of carboxylic acid. This \[ - COOH\] group will be attached to the alkyl or aryl group in order to give an acid.

- Discussing option (C), \[ - OH\] is the Hydroxyl group which is the functional group of alcohol. When one hydrogen in the hydrocarbon is replaced by the hydroxyl group, it will give alcohol. Alcohol is a derivative of Hydrocarbon.

- Discussing option (D), \[ - CHO\] is the functional group for an aldehyde.
So, the correct answer is “Option C”.

Additional information:
Alcohol has been used for various purposes such as
- Disinfectant
- Antiseptic
- Manufacture of acetone
- Rubbing alcohol
- Preparation of vinegar
- Fuel
So, the correct answer is “Option C”.

Note: - Primary alcohol on oxidation, it will produce aldehydes that on further oxidation will give acid.
- Secondary alcohol on oxidation, we will get ketones.
- Alcohol when it combines with acids, we will get esters.
- On Hydration of alkene, alcohol will be produced.