Distillation process is used for purification of:

Options

A. Zn
B. Ge
C. Ni
D. Co

Answer

To solve the question regarding which metal is purified using the distillation process, we can follow these steps:

### Step 1: Understand Distillation
Distillation is a separation process that relies on differences in boiling points of substances. It is commonly used to purify liquids or to separate components of a mixture.

### Step 2: Analyze the Metals
We need to consider the boiling points of the given metals: zinc, germanium, nickel, and cobalt.

- **Zinc**: Boiling point is approximately 907 °C (1180 K).
- **Germanium**: Boiling point is around 2833 °C (3106 K).
- **Nickel**: Boiling point is about 2913 °C (3186 K).
- **Cobalt**: Boiling point is approximately 2927 °C (3200 K).

### Step 3: Identify Non-Volatile Impurities
In the distillation process, the goal is to vaporize the desired substance while leaving behind non-volatile impurities. For zinc, common non-volatile impurities include cadmium, lead, and iron.

### Step 4: Determine the Suitable Metal for Distillation
Among the metals listed, zinc has a relatively low boiling point compared to germanium, nickel, and cobalt. This allows zinc to vaporize while the non-volatile impurities remain in the container.

### Step 5: Conclusion
Since zinc can be effectively purified through distillation due to its boiling point and the presence of non-volatile impurities, the answer to the question is:

**Zinc (A)**

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