Which of the following gas is formed when copper reacts with a hot dilute nitric acid?

N₂O

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N₂O₅

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NO₂

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Solution

The correct option is C
NO₂

Copper reacts with hot dilute nitric acid to form copper(II) nitrate, water and nitrogen dioxide gas.

$C u + 4 H N O_{3} \to C u (N O_{3})_{2} + 2 H_{2} O + 2 N O_{2}$

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N O_{3}^{⊖}

C u + N O_{3}^{⊖} ⟶ N O_{2} + {C u}^{2 +}

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