Short answerEasy1 mark
5(ii)
Ammonia gas is passed over heated copper (II) oxide in a combustion tube:
What will be the colour of the residue that is left in the combustion tube at the end of the reaction?
Topic: Ammonia: preparation, properties and reactions
Previous-year question practice database
Answer
Exam answer
Reddish-brown copper.
Explanation
2NH₃ + 3CuO → 3Cu + 3H₂O + N₂.
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