NO2 and O2
H2O and NO2
NO2' O2 and H2O
NO, NO2 and H2O
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Please the answer is A now
4HNO3(aq)--2H2O(I) +NO2(g)+O2(g)
No2 and O2 is the brown fumes
Note h20 is a liquid
Option **A (NO₂ and O₂)** is partially correct but incomplete.
When trioxonitrate (V) acid (HNO₃) is heated, the decomposition products are **NO₂** (nitrogen dioxide), **O₂** (oxygen), and **H₂O** (water). The brown fumes are due to **NO₂**, but water vapour (**H₂O**) is also produced in the reaction.
Thus, **A** is incomplete because it doesn't account for the **H₂O** formed during the decomposition process. The complete answer is **C (NO₂, O₂, and H₂O)**.
The correct answer is A. The brown fumes given off when trioxonitrate (V) acid (also known as nitric acid) is heated consist of NO2 (nitrogen dioxide) and O2 (oxygen). Nitric acid decomposes into nitrogen dioxide and oxygen when heated, and the brown color of the fumes is due to the presence of NO2.
The correct answer is C. NO₂, O₂, and H₂O.
Here's why:
When trioxonitrate (V) acid (nitric acid) is heated, it breaks down. This decomposition produces:
* Nitrogen dioxide (NO₂): This is the brown gas you see.
* Oxygen (O₂): This is a colorless gas.
* Water (H₂O): This is released as steam.
So, the brown fumes are a mixture of these three products.
