Test: Nomenclature Of Organic Compounds - Class 10 MCQ

The IUPAC name of CH₃CHO is Ethanal.

The IUPAC name for CH₃CHO is Ethanal, also known as Acetaldehyde. It has 2 carbons, so the term “Eth” is used as prefix and it belongs to the aldehyde group, so the term “al” is used as suffix.

The base name is identified by counting the carbon atoms.

Aldehydes have the suffix "-al," such as "propanal."

Alkenes use the suffix "-ene."

A double bond in a three-carbon chain results in the name "propene."

The suffix for ketones is "-one."

Functional groups are indicated by either a prefix or a suffix.

A triple bond is indicated by the suffix "-yne."

A triple bond in a three-carbon chain is indicated by the suffix "-yne," resulting in "propyne."

If the suffix begins with a vowel, the final 'e' of the carbon chain is deleted.

When the suffix starts with a vowel, the final 'e' of the carbon chain is deleted to ensure smooth pronunciation.

Carboxylic acids use the suffix "-oic acid."

Haloalkanes use prefixes like "chloro-" or "bromo-" to indicate halogen groups.

The suffix for alcohols is "-ol."

The compound CH₃-O-C₂H₅ is an ether.

• The IUPAC name is based on identifying the groups attached to the oxygen atom.
• CH₃ is the methoxy group.
• C₂H₅ is an ethyl group.

Therefore, the IUPAC name of the compound is methoxy ethane.