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9701 MCQ Solution 36
Question 36:
[Inorganic > Nitrogen and Sulfur]:
Ammonia and chlorine react in the gas phase.
8NH3 +
3Cl2 à N2 +
6NH4Cl
Which statements are correct?
1 Ammonia behaves as a reducing agent.
2 Ammonia behaves as a base.
3 The oxidation number of the hydrogen changes.
Reference: Past Exam Paper – November 2002 Paper 1 Q36
Solution 36:
Answer: B.
The chlorine atoms change oxidation state from 0 to -1 which is reduction
hence ammonia has caused reduction and 1 is correct.
A base is a proton (H+)
acceptor and ammonia does this when becoming an ammonium ion in the ammonium
salt, thus 2 is also correct.
Oxidation number of hydrogen does not change; in
ammonia: +1, in salt: +1, thus 3 is incorrect and the correct option is B.
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