The pH of the acid rain is approximately a)5.6 b)`2-3` c)`7-9` d)` gt 10`

Options

A. 7
B. 6.56
C. `5.6`
D. 11

Answer

To determine the approximate pH of acid rain, we can follow these steps:

### Step 1: Understand the Concept of Acid Rain
Acid rain is a form of precipitation that is significantly more acidic than normal rainwater. It is primarily caused by the presence of sulfuric and nitric acids in the atmosphere, which result from the oxidation of sulfur dioxide (SO₂) and nitrogen oxides (NOₓ).

**Hint:** Research the definition and causes of acid rain to understand its formation.

### Step 2: Know the pH Scale
The pH scale ranges from 0 to 14, where:
- A pH of 7 is considered neutral (pure water).
- A pH less than 7 indicates acidity.
- A pH greater than 7 indicates alkalinity.

**Hint:** Familiarize yourself with the pH scale and what it represents.

### Step 3: Identify the pH of Normal Rainwater
Normal rainwater has a pH of about 5.6 due to the natural presence of carbonic acid formed from carbon dioxide in the atmosphere.

**Hint:** Recall the pH of normal rainwater and how it compares to acid rain.

### Step 4: Determine the pH Range of Acid Rain
Acid rain typically has a pH that is lower than 5.6. It can range from about 4.0 to 5.5, but in severe cases, it can drop to as low as 2.0 to 3.0.

**Hint:** Look for information on the pH levels of acid rain and how they compare to normal rainwater.

### Step 5: Analyze the Given Options
The options provided are:
a) 5.6
b) 2-3
c) 7-9
d) > 10

Given that acid rain is more acidic than normal rainwater, the correct option must be one that reflects a pH lower than 5.6.

**Hint:** Compare each option with the known pH range of acid rain to find the correct answer.

### Step 6: Select the Correct Answer
Based on the information gathered, the approximate pH of acid rain is generally between 2 to 5.5, making option b) 2-3 the most accurate choice.

**Final Answer:** b) 2-3