Which of the following statements is wrong?

Options

A. Polar stratosphere clouds (PSCs) are clouds formed over Antarctica
B. Acid rain dissolves heavy metals such as Cu ,Pb, Hg and Al from soils, rocks and sediments.
C. `H_(2)SO_(4)` is major contributor to acid rain, `HNO_(3)` ranks second and HCl third in this respect
D. Fishes grow as well in warm as in cold water

Answer

To determine which statement among the given options is wrong, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Statement A**: "Polar stratospheric clouds are clouds formed over Antarctica."
- **Analysis**: Polar stratospheric clouds (PSCs) indeed form at high altitudes in the stratosphere, primarily over Antarctica during winter when temperatures drop below the frost point. This statement is true.

2. **Statement B**: "Acid rain dissolves heavy metals such as copper, lead, mercury, and aluminum from soil salts and sediments."
- **Analysis**: Acid rain, which contains acids like sulfuric acid (H₂SO₄) and nitric acid (HNO₃), can lead to the dissolution of heavy metals from soils and sediments through cation exchange processes. This statement is also true.

3. **Statement C**: "H₂SO₄ that is sulfuric acid is a major contributor to acid rain and HNO₃ that is nitric acid ranks second while HCl that is hydrochloric acid ranks third."
- **Analysis**: Sulfuric acid is indeed a major contributor to acid rain, primarily formed from sulfur dioxide emissions. Nitric acid is also a significant contributor, while hydrochloric acid is less prevalent. This statement is true.

4. **Statement D**: "Fishes grow as well in warm as in cold water."
- **Analysis**: This statement is false. Fish require dissolved oxygen for survival, and warm water holds less dissolved oxygen compared to cold water. Therefore, fish do not grow as well in warm water as they do in cold water.

### Conclusion:
The wrong statement is **Statement D**: "Fishes grow as well in warm as in cold water."

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