MolSynapsequestion bank

MolSynapse / Question bank / IUPAC Nomenclature and Structural Isomerism / Functional group priority in drawn compounds

JEE Advanced levelOne or more correct optionsDifficulty 3 of 3nm245

Which of the following statements about the compound shown are correct?

AThe aldehyde is the principal group, so the suffix is -al.
BThe ketone carbonyl is expressed by the prefix oxo with locant 4.
CThe compound contains two carbonyl groups.
DThe molecular formula is $C X_{5} H X_{10} O X_{2}$ .

Answer: A, B, C

The compound is 4-oxopentanal (C5H8O2). Aldehyde outranks ketone, so the chain is numbered from the CHO carbon and the ketone becomes oxo at C4. The formula is C5H8O2, not C5H10O2, since two C=O groups give two degrees of unsaturation.

Practice IUPAC Nomenclature and Structural Isomerism More on Functional group priority in drawn compounds

Previous questionNext question

More questions on Functional group priority in drawn compounds

What is the IUPAC name of the compound shown? JEE Main level
Which of the following statements about the compound shown are correct? JEE Main level
What is the IUPAC name of the compound shown? Numbering starts from the principal group. JEE Advanced level
What is the IUPAC name of the compound shown? Ignore any stereodescriptors. JEE Advanced level
Write the IUPAC name of the compound shown: the ketone is the principal group and gets the lowest locant, then the double bond gets the lowe... JEE Advanced level
Which of the following statements about the compound shown are correct? Use the priority order acid > ester > acid halide > amide. JEE Advanced level