Test: Nomenclature Of Organic Compounds - Class 10 MCQ

• CH3-O-C2H5 consists of a methoxy group (CH3-O-) and an ethyl group (-C2H5).
• In IUPAC nomenclature, the methoxy group (CH3-O-) is named as "methoxy".
• The ethyl group (-C2H5) is named as "ethane" because it is derived from ethane by removing one hydrogen atom.

Therefore, combining these, the correct IUPAC name is methoxy ethane.

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.

• Dienes are compounds that contain two double bonds in their structure.
• The prefix "di-" in diene indicates the presence of two double bonds.
• Examples of dienes include butadiene (CH2=CH-CH=CH2) and isoprene (CH2=C(CH3)-CH=CH2).

Therefore, dienes are specifically named for compounds with two double bonds.

• Cyclopropane is the smallest alkane that can form a ring structure.
• It consists of three carbon atoms bonded in a ring, with each carbon atom bonded to two hydrogen atoms.
• The molecular formula of cyclopropane is C3H6.

• The correct IUPAC name for acetylsalicylic acid is 2-acetoxybenzoic acid.
• This is because the acetyl (acetoxy) group is attached to the second carbon of the benzene ring, relative to the carboxylic acid group (benzoic acid).