Statement I `: ` Dimethyl sulphide is commonly used for the reduction of an ozonide of compound.
Statement II`:` It reduces the ozonide giving water soluble dimethyl sulphoxide and excess of it evaporates.

Options

A. Statement `I` is true, Statement `II` is true, Statement `II` is the correct explanation of Statement `I`.
B. Statement`I` is true, Statement`II` is true, Statement `II` is not the correct explanation of Statement `I`.
C. Statement `I` is true, Statement `II` is false.
D. Statement `I` is false, Statement `II` is true.

Explanation

To solve the question regarding the statements about dimethyl sulfide and its role in the reduction of ozonides, we can break it down step by step.

### Step-by-Step Solution:

1. **Understanding Ozonides**:
- Ozonides are formed when alkenes react with ozone (O₃). The general reaction can be represented as:
\[ RCH=CHR + O_3 \rightarrow RCH(O)OCR \]
- This reaction produces an ozonide, which contains a cyclic structure with oxygen.

**Hint**: Remember that ozonides are intermediates formed during the ozonolysis of alkenes.

2. **Role of Dimethyl Sulfide**:
- Dimethyl sulfide (DMS), with the formula (CH₃)₂S, is used as a reducing agent. It can reduce ozonides to yield carbonyl compounds.
- The reaction can be represented as:
\[ RCH(O)OCR + (CH_3)_2S \rightarrow RCHO + (CH_3)_2SO \]
- Here, DMS reduces the ozonide, resulting in the formation of carbonyl compounds (aldehydes or ketones) and dimethyl sulfoxide (DMSO).

**Hint**: Identify the functional groups involved in the reaction to understand the reduction process.

3. **Formation of Dimethyl Sulfoxide**:
- The product formed from the reaction between DMS and ozonide is dimethyl sulfoxide (DMSO), which is water-soluble.
- The reaction leads to the formation of DMSO and the release of carbonyl compounds.

**Hint**: Consider the solubility properties of the products formed during the reaction.

4. **Evaporation of Excess DMS**:
- Since DMS is volatile, any excess dimethyl sulfide that is not consumed in the reaction will evaporate.
- This property is beneficial as it allows for easier isolation of the desired products (like DMSO and carbonyl compounds).

**Hint**: Think about how the physical properties of a compound (like volatility) can affect the reaction outcome.

5. **Conclusion**:
- Both statements are true:
- **Statement I**: Dimethyl sulfide is commonly used for the reduction of ozonides.
- **Statement II**: It reduces the ozonide to give water-soluble dimethyl sulfoxide, and excess DMS evaporates.
- Therefore, the correct conclusion is that both statements are true, and Statement II explains Statement I.

**Final Answer**: Both Statement I and Statement II are true.