The question seems to be incomplete, as "copper oxide" can refer to two common, stable compounds. Assuming the user is asking for the common black form, CuO is the solution; if the user refers to the red form, then Cu₂O is the solution.
What is the chemical formula of copper oxide?
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Question context
This question is part of 🧬 Biochemistry within the broader 🧬 Medical Science subject and appears in the ASF Airports Security Force preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.