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Gases liberated when Cu and Zn react with dil. HNO₃ separately

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NO₂, N₂O

NO, N₂O

NO, NO₂

N₂O, NO₂

answer is C.

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Detailed Solution

Question Image

Reaction of Copper (Cu) with Dilute HNO₃:

Copper is less reactive than hydrogen and does not displace it from acids like HCl or H₂SO₄.

However, it reacts with dilute HNO₃ because HNO₃ is a strong oxidizing agent. The reaction produces nitric oxide (NO) as the gas.

3Cu + 8HNO₃ → 3Cu(NO₃)₂ + 2NO + 4H₂O

Gas liberated: NO (Nitric oxide)

Reaction of Zinc (Zn) with Dilute HNO₃:

Zinc is more reactive than hydrogen and reacts with dilute HNO₃ to produce nitrous oxide (N₂O) as the gas.

4Zn + 10HNO₃ → 4Zn(NO₃)₂ + N₂O + 5H₂O

Gas liberated: N₂O (Nitrous oxide)

Answer:

The gases liberated are:

Copper (Cu): NO
Zinc (Zn): N₂O

Correct Option: C) NO, N₂O

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