The mineral carnallite contains (i)("__________"") and (ii)("__________"") metals.
(iii)("__________"") is purified by cupellation and (iv)("__________"") is purified by distillation .

Options

A. `{:("(i)","(ii)","(iii)","(iv)"),("calcium","zinc","mercury","tin"):}`
B. `{:("(i)","(ii)","(iii)","(iv)"),("calcium","magnesium","zinc","lead"):}`
C. `{:("(i)","(ii)","(iii)","(iv)"),("potassium","calcium","copper","mercury"):}`
D. `{:("(i)","(ii)","(iii)","(iv)"),("magnesium","potassium","silver","mercury"):}`

Answer

To solve the question regarding the mineral carnallite and the purification methods for certain metals, we can break it down step by step:

### Step 1: Identify the Metals in Carnallite
- **Carnallite** is a mineral with the chemical formula KCl·MgCl2·6H2O.
- From this formula, we can see that it contains:
- Potassium (K)
- Magnesium (Mg)

### Step 2: Identify the Metal Purified by Cupellation
- **Cupellation** is a refining process used to separate noble metals from base metals.
- The metal that is typically purified using cupellation is:
- Silver (Ag)

### Step 3: Identify the Metal Purified by Distillation
- **Distillation** is a separation process that can be used to purify certain metals by taking advantage of their different boiling points.
- The metal that is commonly purified through distillation is:
- Mercury (Hg)

### Final Answers
Now we can fill in the blanks based on our findings:
1. The mineral carnallite contains (i) **Potassium** and (ii) **Magnesium** metals.
2. (iii) **Silver** is purified by cupellation.
3. (iv) **Mercury** is purified by distillation.

### Summary of Answers
- (i) Potassium
- (ii) Magnesium
- (iii) Silver
- (iv) Mercury