Solve the following


(i) Draw the structures of all isomeric alcohols of molecular formula C5H12O and give their IUPAC names.

(ii) Classify the isomers of alcohols in question 11.3 (i) as primary, secondary and tertiary alcohols.


(i) The structures of all isomeric alcohols of molecular formula, C5H12O are shown below:


Pentan-1-ol (1°)


2-Methylbutan-1-ol (1°)


3-Methylbutan-1-ol (1°)


2, 2-Dimethylpropan-1-ol (1°)


Pentan-2-ol (2°)


3-Methylbutan-2-ol (2°)


Pentan-3-ol (2°)


2-Methylbutan-2-ol (3°)

(ii) Primary alcohol: Pentan-1-ol; 2-Methylbutan-1-ol;

3-Methylbutan-1-ol; 2, 2−Dimethylpropan-1-ol

Secondary alcohol: Pentan-2-ol; 3-Methylbutan-2-ol;


Tertiary alcohol: 2-methylbutan-2-ol

Leave a comment


Click here to get exam-ready with eSaral

For making your preparation journey smoother of JEE, NEET and Class 8 to 10, grab our app now.

Download Now