WAEC Chemistry 2025 Objective — Question 21

Question 21 of 50 from the West African Examinations Council (WAEC) Chemistry 2025 Objective paper, with the correct answer and a full explanation.

Which of the following compounds would readily undergo addition reaction?

A. ethane
B. buteneCorrect
C. ethanol
D. benzene

Explanation

Butene is an alkene, and alkenes readily undergo addition reactions due to the presence of a double bond between carbon atoms. This double bond can be broken to add other atoms or groups, such as hydrogen (hydrogenation), halogens (halogenation), or hydrogen halides (hydrohalogenation).

Sign up free to unlock

Score tracking
Practice history
Saved questions
Progress dashboard
Personalized sessions
Weak-topic breakdown

…and/or go further with premium services and No Ads.

Create free account

More questions from Chemistry 2025 Objective More Chemistry past papers