- Home
- Standard 12
- Chemistry
General Principles and processes of Isolation of Elements
medium
Which of the following products will be obtained when copper metal is reacted with $HNO _{3}$ ?
A
$N O$ and $N_{2} O_{5}$
B
$N O$ and $N O_{2}$
C
$N O_{2}$ and $N_{2} O_{5}$
D
$H N O_{2}$ and $N_{2}$
(AIIMS-2018)
Solution
The products of the reaction of copper with $H N O_{3}$ depends upon the concentration of $H N O_{3}$ used.
Copper metal reacts with dilute $H N O_{3}$ to form nitrogen $(II)$ oxide $(NO)$.
$3 C u+8 H N O_{3}($ dil. $) \rightarrow 3 C u\left(N O_{3}\right)_{2}+2 N O+4 H_{2} O$
Copper metal reacts with conc. $H N O_{3}$ to form nitrogen $(IV)$ oxide or nitrogen dioxide $\left(N O_{2}\right)$
$C u+4 H N O_{3}($ conc. $) \rightarrow C u\left(N O_{3}\right)_{2}+2 N O_{2}+2 H_{2} O$
Standard 12
Chemistry
