Acid Rain Is Less of a Threat to Lakes and Streams

question 9

Multiple Choice

Acid rain is less of a threat to lakes and streams in areas where the bedrock is limestone (CaCO₃) . Which of the following is the equation for neutralization of acid by limestone?

• A) CaCO₃ + 2OH^- → Ca(OH)₂ + CO₂
• B) CaCO₃ + 2H₃O⁺ → Ca²⁺ + CO₂ + 3H₂O
• C) CaCO₃ + H₃O → Ca + CO₂ + H₂O
• D) CaCO₃ + OH^- → Ca²⁺ + CO₂ + H₂O
• E) CaCO₃ + 2H₃O⁺ → Ca²⁺ + CO₂ + 2H₂O

---

Definitions:

Multiple Hurdles Approach

A selection process where candidates must pass through several stages or "hurdles" of evaluation before being considered for a position.

Compensatory Approach

A method used in decision-making and assessment that allows for the offsetting of weaknesses in one area with strengths in another.

Structured Approach

A methodical, organized way of addressing problems or completing tasks that follows a specific predetermined protocol.

Structured Questions

Clearly defined questions that restrict responses to a particular format or set of options, often used in surveys and interviews to gather consistent data.