Comments on: O Levels Chemistry Questions: More Challenging Exam-Based Questions

By: Samiha

Samiha — Sat, 31 Oct 2009 15:45:43 +0000

thanks

sean — Sat, 31 Oct 2009 15:32:30 +0000

Hi JM,

I love the way you explained it.

Your answers are spot on!

Keep up the good work,
Sean

sean — Sat, 31 Oct 2009 15:31:59 +0000

Hi Samiha,

Answer for Question 2 is (C) as suggested by JM above.

The products of that mixing gives you Sodium chloride (soluble) + barium sulfate (insoluble/ppt).

Please note that your choice is incorrect since Barium Chloride is soluble in water.

Hope this helps.

Samiha — Fri, 30 Oct 2009 12:30:39 +0000

wats da ryt answer for Q2 ??? :S D or C n why?? :S

Samiha — Mon, 26 Oct 2009 04:18:29 +0000

Q1. A (copper does not react with dilute acids)

Q2. D (white ppt of barium chloride formed)

Q3. A ( the reaction shows dat barium is in (aq) state wheres options C and D shows barium is solid. in B, the BaSO4 is already a compound)