Question

Olefin, which gives $C{H}_{3}CHO$ and $C{H}_{3}C{H}_{2}CHO$ on ozonization and hydrolysis is :

• A. 1butene
• B. 2butene
• C. 1pentene
• D. 2pentene

Answer 1

Answer: (D)

2pentene

1butene on ozonolysis gives ${CH}_3{CH}_{2}CHO$ ( Propanaldehyde ) and $HCHO$ ( formaldehyde )

2butene on ozonolysis gives 2 moles of ${CH}_{3}CHO$ ( acetaldehyde )

1pentene on ozonolysis gives ${CH}_3{CH}_2{CH}_{2}CHO$ ( butanaldehyde )

2pentene on ozonolysis gives ${CH}_{3}CHO$ ( acetaldehyde ) and${CH}_3{CH}_{2}CHO$ ( Propanaldehyde )

[For ozonolysis reaction cut the $C=C$ and replace with $C=O$]

Hence the correct option is D.