WAEC Chemistry 2025 Objective — Question 20
Question 20 of 50 from the West African Examinations Council (WAEC) Chemistry 2025 Objective paper, with the correct answer and a full explanation.
Advertisement
How many pi-bond(s) is/are present in propene?
- A. three
- B. six
- C. two
- D. oneCorrect
Explanation
Propene (C3H6) has one pi-bond. In the double bond between two carbon atoms, one bond is a sigma bond (formed by overlap of sp2 hybridized orbitals), and the other is a pi bond (formed by sideways overlap of unhybridized p-orbitals).
Advertisement
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.