Which of the following statements is wrong ?

Options

A. Ozone is not responsible for greenhouse effect.
B. Ozone can oxidise sulphur dioxide present in the atmosphere to sulphur trioxide
C. Ozone hole is thinning of ozone layer present in stratosphere.
D. Ozone is produced in upper stratosphere by the action of UV rays on oxygen

Explanation

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

### Step 1: Analyze the first statement
**Statement:** Ozone is not responsible for the greenhouse effect.

**Analysis:** This statement is incorrect. Ozone (O3) is indeed a greenhouse gas, meaning it contributes to the greenhouse effect by trapping heat in the atmosphere. Therefore, this statement is false.

### Step 2: Analyze the second statement
**Statement:** Ozone can oxidize sulfur dioxide (SO2) present in the atmosphere to sulfur trioxide (SO3).

**Analysis:** This statement is true. Ozone can react with sulfur dioxide and oxidize it to sulfur trioxide. Thus, this statement is correct.

### Step 3: Analyze the third statement
**Statement:** The ozone hole is the thinning of the ozone layer present in the stratosphere.

**Analysis:** This statement is also true. The term "ozone hole" refers to the significant reduction of ozone in the stratosphere, particularly over Antarctica. Therefore, this statement is correct.

### Step 4: Analyze the fourth statement
**Statement:** Ozone is produced in the upper stratosphere by the action of UV rays and oxygen.

**Analysis:** This statement is true as well. Ozone is formed when ultraviolet (UV) radiation splits oxygen molecules (O2) into individual oxygen atoms, which can then react with other oxygen molecules to form ozone (O3). Thus, this statement is correct.

### Conclusion
After analyzing all the statements, we find that the first statement is the only one that is wrong. Therefore, the answer to the question is:

**The wrong statement is:** Ozone is not responsible for the greenhouse effect.

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