JAMB Chemistry 2010 Objective — Question 32

Question 32 of 50 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2010 Objective paper, with the correct answer and a full explanation.

32. In the diagram above, the gas produced is A. N2O B. N2O4 C. NO D. NO2

• A. N2O
• B. N2O4
• C. NOCorrect
• D. NO2

Explanation

With dilute HNO3 and copper turnings, the gas produced directly is NO, which turns brown (forming NO2) on contact with air.

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