Match List I with List II and select the correct answer using the codes given below the list `:`
`{:("List " I,"List II",,,),((i)"Heavy water",(A)"Bicarbonates of Mg and Ca in water ",,,),((ii)"Temporary hard",(B)"lather with soap water",,,),((iii)"Soft water",(C ) D_(2)O,,,),((iv)"Permanent hard",(D)"Sulphates and water chloride of Mg and Ca",,,):}`
Code `:`

Options

A. `i-C,ii-D,iii-B,iv-A`
B. `i-B,ii-A,iii-C,iv-D`
C. `i-B,ii-D,iii-C,iv-A`
D. `i-C,ii-A,iii-B,iv-D`

Answer

To solve the matching question between List I and List II, we will analyze each item in List I and find its corresponding match in List II step by step.

### Step 1: Identify Heavy Water
- **List I**: Heavy Water
- **Explanation**: Heavy water is chemically represented as D₂O. It is used in nuclear reactors as a moderator to slow down neutrons.
- **Match**: Heavy water (D₂O) corresponds to (C) in List II.

### Step 2: Identify Temporary Hard Water
- **List I**: Temporary Hard Water
- **Explanation**: Temporary hardness in water is primarily due to the presence of bicarbonates of magnesium (Mg²⁺) and calcium (Ca²⁺). When these bicarbonates are present, they can be removed by boiling the water.
- **Match**: Temporary hard water corresponds to (A) Bicarbonates of Mg and Ca in water.

### Step 3: Identify Soft Water
- **List I**: Soft Water
- **Explanation**: Soft water is characterized by the absence of extra ions that can interfere with soap. It does not form scum with soap and can easily produce lather.
- **Match**: Soft water corresponds to (B) Lather with soap water.

### Step 4: Identify Permanent Hard Water
- **List I**: Permanent Hard Water
- **Explanation**: Permanent hardness is caused by the presence of sulfates and chlorides of magnesium and calcium in water. This type of hardness cannot be removed by boiling.
- **Match**: Permanent hard water corresponds to (D) Sulphates and chlorides of Mg and Ca.

### Final Matches
Based on the analysis, we can summarize the matches as follows:
1. Heavy Water - (C) D₂O
2. Temporary Hard Water - (A) Bicarbonates of Mg and Ca in water
3. Soft Water - (B) Lather with soap water
4. Permanent Hard Water - (D) Sulphates and chlorides of Mg and Ca

### Conclusion
The correct matching is:
- (i) Heavy Water - (C)
- (ii) Temporary Hard Water - (A)
- (iii) Soft Water - (B)
- (iv) Permanent Hard Water - (D)

The final answer code is: C A B D

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