Which of the following statement is wrong ?

Options

A. Two sulphur atoms in the thiosulphate ions occupy equivalent positions
B. lce results from cooling of water whereas snow results from cooling of vapours to solid
C. Formation of ice is solidification whereas formation of snow is Hoar frost
D. Ice sublimes on moon

Answer

To solve the question, we need to analyze each of the statements provided and determine which one is incorrect.

### Step-by-Step Solution:

1. **Understanding Thiosulfate Ion**:
- The thiosulfate ion has the formula \( \text{S}_2\text{O}_3^{2-} \).
- Its structure can be represented as \( \text{S}=\text{S}-\text{O}_3^{2-} \).

**Hint**: Look at the structure of thiosulfate and identify the positions of the sulfur atoms.

2. **Analyzing the First Statement**:
- The first statement claims that the two sulfur atoms in thiosulfate occupy equivalent positions.
- However, upon examining the structure, we find that the two sulfur atoms are not equivalent due to their different bonding environments (one is double-bonded and the other is single-bonded).

**Hint**: Compare the bonding of the two sulfur atoms to determine their equivalency.

3. **Evaluating the Second Statement**:
- The second statement says that ice results from cooling of water while snow results from cooling of vapors to solid.
- This statement is true because ice is formed when water freezes, and snow can form from water vapor directly through deposition.

**Hint**: Recall the processes of freezing and deposition to validate this statement.

4. **Checking the Third Statement**:
- The third statement asserts that the formation of ice is solidification.
- This is also true, as solidification is the process of a liquid turning into a solid.

**Hint**: Remember the definition of solidification in the context of phase changes.

5. **Examining the Fourth Statement**:
- The fourth statement claims that ice sublimes on the Moon.
- This is true because, on the Moon, the low pressure allows ice to transition directly from solid to gas without becoming liquid.

**Hint**: Consider the conditions on the Moon that affect phase changes of substances.

6. **Conclusion**:
- After analyzing all the statements, we find that the first statement is incorrect while the others are true.
- Therefore, the answer to the question is that the first statement is the wrong one.

### Final Answer:
The incorrect statement is: "Two sulfur atoms in the thiosulfate ions occupy equivalent positions."