O Levels Chemistry Questions: More Challenging Exam-Based Questions

2009 GCE ‘O’ Levels Examinations will start in few days time. If you are a student based in Singapore, you must be excited it.

Hope you are revising well for Chemistry Exams. In any case that you would like more challenging exam-based questions to discuss – check out the following questions on Salts!

Question 1:
Which of the following salts cannot be prepared by reacting a metal with a dilute acid?

A. copper(II) chloride
B. iron (II) chloride
C. magnesium sulfate
D. zinc sulfate

Question 2:
Which one of the following pairs consists of substances that produce a precipitate when their aqueous solutions are mixed?

A. sodium nitrate, barium chloride
B. sodium nitrate, silver sulfate
C. sodium sulfate, barium chloride
D. sodium chloride, barium nitrate

Question 3:
The reaction represented by the ionic equation:

Ba2+(aq) + SO42-(aq) –> BaSO4(s)

takes place readily when:

A. aqueous barium nitrate is added to aqueous sodium sulfate
B. molten barium sulfate is cooled until it solidifies
C. solid barium chloride is added to dilute sulfuric acid
D. solid barium sulfate is heated until it melts

All the best to your final revision for ‘O’ Level Chemistry Exams!

PS: I would love to hear from you on your preparation towards the exams. Hope this website helps you all this while.

Cheers,

Sean =)