A) Zinc with cold and dilute \[HN{{O}_{3}}\]
B) Zinc with concentrated \[HN{{O}_{3}}\]
C) Copper with cold and dilute \[HN{{O}_{3}}\]
D) Heating \[N{{H}_{4}}N{{O}_{3}}\]
Correct Answer: C
Solution :
\[3Cu+8NH{{O}_{3}}\to 3Cu\,{{(N{{O}_{3}})}_{2}}+\]\[4{{H}_{2}}O+\underset{\text{Nitric}\,\,\text{oxide}}{\mathop{2NO}}\,\]
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