JAMB Chemistry 2009 Objective — Question 37

Question 37 of 50 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2009 Objective paper, with the correct answer and a full explanation.

Copper dissolves in Conc. HNO3 to liberate NO2 gas. It must be noted that NO is produced if the acid is dilute

A. TrueCorrect
B. False
C. —
D. —

Explanation

Cu+4HNO3->Cu(NO3)2+2H2O+2NO2 (Conc. Acid). 3Cu+8HNO3->3Cu(NO3)2+4H2O+2NO (dilute acid). Copper dissolves in Conc. HNO3 to liberate NO2 gas; NO is produced if the acid is dilute.

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