MEDIUMMCQ SINGLEJEE Advanced ChemistryInorganic Chemistryp -Block Elements (group 15-18)Previous Year Questions
Which of the following products will be obtained when copper metal is reacted with HNO₃? (AIIMS 2018)
A.NO and N₂O₅
B.NO and NO₂✓ Correct
C.NO₂ and N₂O₅
D.HNO₂ and N₂
Explanation
The products of the reaction of copper with HNO₃ depends upon the concentration of HNO₃ used. Copper metal reacts with dilute HNO₃ to form nitrogen (II) oxide (NO). 3 3 2 3Cu 8HNO (dil.) 3Cu(NO ) 2NO 4H O → Copper metal reacts with conc. HNO₃ to form nitrogen (IV) oxide or nitrogen dioxide (NO₂). 3 3 2 2 2 Cu 4HNO (conc.) Cu(NO ) 2NO 2H O →
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