Which of the following metal produces $N_{2} O$ gas with $20 % H N O_{3}$ ?

F e

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C u

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Z n

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S n

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Solution

The correct options are
A $F e$
C $Z n$
Option (A),(C) are correct.
$F e$ and $Z n$ produces $N_{2} O$ gas with $20 % H N O_{3}$ .
$\begin{matrix} M & + & d i l . H N O_{3} & ⟶ & M {(N O_{3})}_{2} & + & N_{2} O (20 %) \end{matrix}$ where, $M$ is metals which are more electropositive than hydrogen except $S n$ and $P b$ .
$\begin{matrix} S n & + & d i l . H N O_{3} & ⟶ & S n {(N O_{3})}_{2} & + & N H_{4} N O_{3} (20 %) \end{matrix}$

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