Acid rain

The video explains how acid rain forms from burning fossil fuels, leading to sulfuric and nitric acids in rainwater. It discusses the natural acidity of rain, the increase in acidity due to fossil fuels, and the formation of sulfuric and nitric acids. The effects of acid rain on the environment, soil, and living organisms are highlighted, emphasizing the harmful impact on growth and metal solubility. The video concludes with a summary of the causes and effects of acid rain.

What is the natural pH level of rain before it becomes acidified by pollutants?

• pH 5

• pH 6

• pH 3

• pH 7

What happens to sulfur in fossil fuels when they are burned?

• It remains unchanged.

• It becomes carbon dioxide.

• It forms sulfur dioxide and then sulfuric acid.

• It turns into nitrogen oxides.

Which gas is primarily responsible for the formation of nitric acid in the atmosphere?

• Methane

• Sulfur dioxide

• Carbon dioxide

• Nitrogen oxides

How does acid rain affect limestone soils?

• It turns them into clay.

• It has no effect.

• It neutralizes the acidity.

• It makes them more acidic.

Why do living organisms struggle to grow in acidic conditions?

• Acidic conditions increase nutrient availability.

• Acidic conditions inhibit enzyme function.

• Acidic conditions enhance enzyme function.

• Acidic conditions promote mold growth.

What happens to toxic metals in acidic soil?

• They turn into essential nutrients.

• They evaporate into the atmosphere.

• They become soluble and are absorbed by plants.

• They become insoluble and harmless.

What is the effect of hydrogen ions in acid rain on essential metal ions in soil?

• They enhance the availability of essential metals.

• They replace essential metal ions, washing them away.

• They have no effect on metal ions.

• They convert essential metals into toxic metals.