Qualitative Analysis: Testing for cations, anions and gases - Quiz 1

From this week onwards, we will have a question each week, to test your understanding of the chemistry concepts covered in this blog. 

For this week, the topic tested is on Qualitative Analysis - Testing for cations, anions and gases. 


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You may like to revise this chapter first before attempting the question. Click here to revise this chapter.



When aqueous sodium hyroxide is added to solution X, a white precipitate is formed. This white precipitate dissolves in excess aqueous sodium hydroxide to give a colourless solution. The solution is then heated. No ammonia gas is produced. However, when a piece of aluminium foil is added, ammonia gas is produced.
Which of the following could X be?
a. ammonium nitrate
b. zinc nitrate
c. aluminium chloride
d. lead (II) chloride