WAEC Chemistry 2020 Objective — Question 18
Question 18 of 50 from the West African Examinations Council (WAEC) Chemistry 2020 Objective paper, with the correct answer and a full explanation.
Advertisement
The boiling point of pentane is higher than that of propane because
- A. carbon-carbon single bonds are stronger
- B. pentane has more covalent bonds to break
- C. pentane does not burn easily as propane
- D. the intermolecular forces in pentane are stronger than those of propaneCorrect
Explanation
Since both propane and pentane are non-polar, the intermolecular forces in them are Van der Waal's forces. However, the Van der Waal's forces in pentane are stronger because pentane is heavier; the strength of Van der Waal's forces increases with size of molecule.
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.