Question

Natural rainfall is often slightly acidic. The natural acidity primarily results from the interaction of water with

A) Volcanic ash
B) Dust particles in the atmosphere
C) Carbon dioxide in the air
D) Ozone in the stratosphere

Answer 1

The natural acidity of rainfall primarily results from the interaction of water with carbon dioxide in the air.

Step-by-step explanation:

Acid rain is rainfall with a pH of less than 5, primarily caused by nonmetal oxides such as CO2, SO2, SO3, NO, and NO2 dissolving in water and forming carbonic acid, sulfuric acid, and nitric acid. The natural acidity of rainfall primarily results from the interaction of water with carbon dioxide in the air. When carbon dioxide dissolves in rainwater, it forms weak carbonic acid, making the rain slightly acidic. This is a natural process that occurs due to the metabolism of organisms and the release of carbon dioxide from fires and volcanic activity.