Match List-I with List-II for the composition of substances and select the correct answer using the code gives below the lists:-
`{:(List-I,List-II),("Substances","Composition"),((A)"Plaster of Paris",(i)CaSO_(4).2H_(2)O),((B)"Epsomite",(ii)CaSO_(4).(1)/(2)H_(2)O),((C)"Kieserite",(iii)MgSO_(4).7H_(2)O),((D)"Gypsum",(iv)MgSO_(4).H_(2)O),(,(v)CaSO_(4)):}`

Options

A. `{:((A),(B),(C),(D).),((iv),(ii),(ii),(i).):}`
B. `{:((A),(B),(C),(D).),((iii),(iv),(i),(ii).):}`
C. `{:((A),(B),(C),(D).),((ii),(iii),(iv),(i).):}`
D. `{:((A),(B),(C),(D).),((i),(ii),(iii),(v).):}`

Answer

To solve the matching question, we need to identify the correct compositions for each substance listed in List-I. Here’s a step-by-step breakdown of the solution:

### Step 1: Identify the composition of Plaster of Paris
- **Substance**: Plaster of Paris
- **Composition**: Plaster of Paris is calcium sulfate with half a molecule of water. Its formula is \( \text{CaSO}_4 \cdot \frac{1}{2} \text{H}_2\text{O} \).
- **Match**: A → (ii) \( \text{CaSO}_4 \cdot \frac{1}{2} \text{H}_2\text{O} \)

### Step 2: Identify the composition of Epsomite
- **Substance**: Epsomite
- **Composition**: Epsomite is magnesium sulfate with seven water molecules. Its formula is \( \text{MgSO}_4 \cdot 7 \text{H}_2\text{O} \).
- **Match**: B → (iii) \( \text{MgSO}_4 \cdot 7 \text{H}_2\text{O} \)

### Step 3: Identify the composition of Kieserite
- **Substance**: Kieserite
- **Composition**: Kieserite is magnesium sulfate with one water molecule. Its formula is \( \text{MgSO}_4 \cdot \text{H}_2\text{O} \).
- **Match**: C → (iv) \( \text{MgSO}_4 \cdot \text{H}_2\text{O} \)

### Step 4: Identify the composition of Gypsum
- **Substance**: Gypsum
- **Composition**: Gypsum is calcium sulfate with two water molecules. Its formula is \( \text{CaSO}_4 \cdot 2 \text{H}_2\text{O} \).
- **Match**: D → (i) \( \text{CaSO}_4 \cdot 2 \text{H}_2\text{O} \)

### Final Matching
Now we can summarize the matches:
- A → (ii) \( \text{CaSO}_4 \cdot \frac{1}{2} \text{H}_2\text{O} \)
- B → (iii) \( \text{MgSO}_4 \cdot 7 \text{H}_2\text{O} \)
- C → (iv) \( \text{MgSO}_4 \cdot \text{H}_2\text{O} \)
- D → (i) \( \text{CaSO}_4 \cdot 2 \text{H}_2\text{O} \)

### Conclusion
Thus, the correct answer using the code is:
- A → (ii)
- B → (iii)
- C → (iv)
- D → (i)

The final answer is option number C.

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