Question 1

Which of the following chemical equations correctly represents the formation of sulfuric acid ($$\mathrm{H_2SO_4}) $$from sulfur trioxide ($$\mathrm{SO_3$}) in $$the atmosphere, a key process in acid rain formation?

Accepted Answer

$$\mathrm{SO_3$ (g) + H_2O (l) \rightarrow H_2SO_4 (aq)}$$

Question 2

A lake in the Appalachian Mountains has a pH of 4.5 and is surrounded by granite bedrock. Which of the following best explains why this lake is more vulnerable to acid rain compared to a lake in Florida?

Accepted Answer

Granite provides low alkalinity, so the lake cannot neutralize acid rain effectively.

Question 3

Which of the following is a direct damaging effect of acid rain on human-made materials?

Accepted Answer

Accelerated corrosion of iron bridges: $$\mathrm{Fe(s) + 2H^+ (aq) \rightarrow Fe$$^{2+}$$ (aq) + H_2$ (g)}$$

Question 4

Which of the following gases is NOT a significant man-made source of acid rain precursors?

Accepted Answer

$$\mathrm{CO_2$}$$ from gasoline combustion

Question 5

Which of the following reactions shows how limestone ($$\mathrm{$$CaCO_3$$}) $$neutralizes acid rain?

Accepted Answer

$$\mathrm{$$CaCO_3$$ (s) + 2H^+ (aq) \rightarrow Ca$$^{2+}$$ (aq) + CO_2$ (g) + H_2O (l)}$$

Question 6

Which of the following best describes why acid rain can lead to fish kills in lakes?

Accepted Answer

Low pH dissolves aluminum compounds, which suffocate fish by coating their gills.

Question 7

Which of the following is a major technological breakthrough that has contributed to the reduction of NOx emissions from vehicles since 1990?

Accepted Answer

Catalytic converters

Question 8

Which of the following statements about the Clean Air Act and its amendments is TRUE?

Accepted Answer

The 1990 Amendment specifically addressed acid rain by targeting SO2 and NOx emissions.

Question 9

A body of water has high concentrations of $$\mathrm{$$HCO_3$$^-}$$, $$\mathrm{CO_3$^{2-}}$$, and $$\mathrm{OH^-}. $$What property does this water have, and how does it affect acid rain?

Accepted Answer

High alkalinity; it can neutralize acid rain and buffer pH changes.

Question 10

Which of the following is a natural source of acid anhydrides that contribute to acid rain?

Accepted Answer

Volcanic eruptions releasing SOx gases

Question 11

Which of the following best explains why the pH of normal rain is slightly acidic (around 5.6)?

Accepted Answer

Atmospheric $$\mathrm{CO_2$}$$ reacts with water to form carbonic acid ($$\mathrm{H_2CO_3}).$$

Question 12

Which of the following control strategies directly removes $$\mathrm{SO_2$}$$ from power plant emissions?

Accepted Answer

Scrubbing with limestone ($$\mathrm{$$CaCO_3$$})$$

Question 13

Which of the following equations represents the neutralization of acid rain by bicarbonate ions in a lake?

Accepted Answer

$$\mathrm{$$HCO_3$$^- (aq) + H^+ (aq) \rightarrow H_2CO_3 (aq) \rightarrow CO_2$ (g) + H_2O (l)}$$

Question 14

Which of the following is a reason why acid rain can damage forests?

Accepted Answer

Acid rain dissolves metals like aluminum in soil, which harms tree roots and nutrient absorption.

Question 15

Which of the following best describes the trend in U.S. SO2 and NOx emissions since 1980?

Accepted Answer

Both SO2 and NOx emissions have dropped significantly due to regulations and cleaner energy sources.

Question 16

Which of the following is a possible consequence of environmental deregulation and rollbacks on acid rain?

Accepted Answer

SO2 and NOx emissions could rebound, slowing ecosystem recovery.

Question 17

Which of the following reactions is responsible for the formation of nitric acid ($$\mathrm{$$HNO_3$$}) $$from nitrogen dioxide ($$\mathrm{NO_2$}) in $$the atmosphere?

Accepted Answer

$$\mathrm{NO_2$ (g) + OH \rightarrow $$HNO_3$$ (aq)}$$

Question 18

Which of the following is a health effect associated with exposure to SO2 and NOx, the major sources of acid rain?

Accepted Answer

Respiratory irritation and increased risk of asthma and bronchitis

Question 19

Which of the following best describes the role of alkalinity in a lake affected by acid rain?

Accepted Answer

Alkalinity acts as a buffer, neutralizing acids and stabilizing pH.

Acid Rain: Chemistry, Sources, Effects, and Control Strategies

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