As the given compound contains 4 carbons and a -OH functional group which shows its name to be Ethanol.

As soon as you see a -OH functional goup attached to an alkyl group you should recog nise it as an Alcohol . And the given alkyl group contains 4 carbons so it could be none other than butanol.

As we can see in the given depiction of the organic compound a halogen so that chlorine is attached to the pentyle ( Alkyle Group) it gives us its IUPAC name as Chloropentane.

In order to name this compound you should first count how many carbons are there and then look for the functional group attached to it to decide its name according to the IUPAC standards.

No sooner than you see the carboxylic functional group you should start anticipating the oic acid suffix to the given Alkyl group.So for the given compound it should be Butanoic acid.

You have to make sure that you judge the functionl group present in the given compound correctly.

There is an upgradation in the physical properties of the members of a homologous series as we move forward in a homologus series.

As the given compound contains ketone functional group so the suffix -one should be added after Butane removing (e) from it .

As soon as you see a -OH functional goup attached to an alkyl group you should recog nise it as an Alcohol . And the given alkyl group contains 4 carbons so it could be none other than butanol.

In order to name this compound you should first count how many carbons are there and then look for the functional group attached to it to decide its name according to the IUPAC standards.