O Level Chemistry & IP Chemistry Notes by 10 Year Series Author - Chemistry Specialist

With GCE O Levels Chemistry (Pure) and Combine Science Examinations in about 37 days time, i hope you are siphoning out some quality time to revise on your Chemistry Concepts.

In view that you might be looking for more questions to attempt, you can try out this question that was sent to me by my student from Cedar Girls.

Question:

Phosphorus and nitrogen are both in Group V of the Periodic Table.
Which ions are produced when phosphine, PH₃, dissolves in water?

A) PH₃⁺, H⁺

B) PH₄⁺, H⁺

C) PH₃⁺, OH^–

D) PH₄⁺, OH^–

Go try it out and leave your suggested answer and thought-process below.

PS: Feel free to send it to your friend that might benefit from this post.

PPS: Remember that mastery of Chemistry requires you to understand the key concepts and the ability to use it for application questions. Rote memorisation alone will not help you to achieve the grades you desire. You have 37 days more! Do something!