Choose the wrong statement/s

Options

A. `CO_(2)` is responsible for greenhouse effect
B. `CO_(2)` can absorb radiation but does not allow them to pass through
C. NO is less harmful than `NO_(2)`
D. Acid rain contains mainly `HNO_(3)`

Answer

To determine the wrong statement(s) from the provided options, we will analyze each statement one by one.

### Step 1: Analyze Statement 1
**Statement:** CO2 is responsible for the greenhouse effect.
**Analysis:** This statement is correct. CO2 (carbon dioxide) is one of the primary greenhouse gases that trap heat in the atmosphere, contributing to the greenhouse effect and global warming.

### Step 2: Analyze Statement 2
**Statement:** CO2 can absorb radiation but does not allow them to pass through.
**Analysis:** This statement is also correct. CO2 absorbs infrared radiation and prevents it from escaping back into space, which contributes to the greenhouse effect.

### Step 3: Analyze Statement 3
**Statement:** NO is less harmful than NO2.
**Analysis:** This statement is correct. Nitric oxide (NO) is generally considered less harmful compared to nitrogen dioxide (NO2), which is more toxic and can cause severe respiratory issues.

### Step 4: Analyze Statement 4
**Statement:** Acid rain contains mainly HNO3.
**Analysis:** This statement is incorrect. Acid rain is primarily formed from the reaction of water vapor with various pollutants, including sulfur oxides and nitrogen oxides, leading to the formation of multiple acids such as sulfuric acid (H2SO4), nitric acid (HNO3), and carbonic acid (H2CO3). It does not contain mainly HNO3.

### Conclusion
Based on the analysis, the wrong statement is:
**Option D:** Acid rain contains mainly HNO3.

### Final Answer
The correct answer to the question is **Option D**.

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