CH-342

Acid rain

Chemistry · Secondary 3 · Hard · Acid rain

A sample of gas is collected over water at 25 °C and 1.00 atm. The gas is a mixture of nitrogen dioxide,

\text{NO}_2

, and oxygen,

\text{O}_2

. Which statement best explains why this mixture causes acid rain when released into the atmosphere?

Both $\text{NO}_2$ and $\text{O}_2$ dissolve in water to form strong acids.
$\text{NO}_2$ reacts with water and oxygen to form nitric acid in rain.
$\text{O}_2$ reacts with water to form sulfuric acid in rain.
The mixture lowers the temperature of clouds, producing acid rain.

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