Question

Isopropyl alcohol and n-propyl alcohols are the example of:

• A. tautomerism
• B. chain isomerism
• C. position isomerism
• D. geometrical isomerism

Answer 1

Answer: (C)

Tautomerism : lt is characteristic of compounds having labile hydrogen atom. The two isomers cannot be separated. e. g., nitro compounds.
Chain isomerism : The two isomers differ in carbon skeleton.
Position isomerism : The position of functional group or substituent group or double or triple bond is different. e. g., $n$-propyl alcohol and isopropyl alcohol.
$\underset{\text{n-propyl alcohol}}{C{H}_3-C{H}_2-\stackrel{\underset{|}{O}H}{C{H}_2}}\underset{\text{Isopropyl alcohol}}{C{H}_3-\stackrel{\underset{|}{O}H}{\mathrm{CH}}C{H}_3}$
Geometrical isomerism : It is exhibited by compounds having double bond and the two groups attached to two carbon atoms are different.