Question

Which of the following will not undergo addition reaction?

• A. C$_4$H$_8$
• B. C$_2$H$_2$
• C. C$_3$H$_8$
• D. C$_2$H$_4$

Hint:

Addition reactions occur in unsaturated hydrocarbons, not alkanes.

Answer 1

The Correct Option is C

Concept: Addition reactions occur in unsaturated hydrocarbons (alkenes and alkynes) that contain double or triple bonds. Saturated hydrocarbons (alkanes) do not undergo addition reactions. Explanation:

• C$_4$H$_8$ → Alkene (unsaturated) ✔
• C$_2$H$_2$ → Alkyne (unsaturated) ✔
• C$_2$H$_4$ → Alkene (unsaturated) ✔
• C$_3$H$_8$ → Alkane (saturated) ✖

Conclusion: C$_3$H$_8$ is a saturated hydrocarbon and does not undergo addition reaction.