Consider the following statements.
I. Zone-refining method is very useful for producing semiconductors.
II. Semiconductors are of high purity.
Which of the above statement (s) is /are true?
Choose the correct option.

Options

A. Only I
B. Only II
C. Both I and II
D. None of these

Answer

To determine the truth of the statements regarding zone-refining and semiconductors, we can analyze each statement step by step.

### Step 1: Understand the Zone-Refining Method
The zone-refining method is a technique used to purify materials, particularly semiconductors. It involves melting a small region (zone) of a solid material and moving this molten zone along the length of the solid. As the molten zone moves, impurities tend to dissolve in the molten state and are carried away, leaving behind a purer solid.

**Hint:** Think about how impurities behave in different states of matter (solid vs. liquid).

### Step 2: Evaluate Statement I
**Statement I:** "Zone-refining method is very useful for producing semiconductors."
- This statement is true because the zone-refining method is specifically designed to produce high-purity materials, which is essential for semiconductors. High purity is crucial for their electrical properties.

**Hint:** Consider why purity is important in semiconductor applications.

### Step 3: Understand the Nature of Semiconductors
Semiconductors, such as silicon and germanium, have electrical properties that are intermediate between conductors and insulators. Their performance is highly dependent on their purity and the presence of impurities (doping).

**Hint:** Recall the role of impurities in modifying the electrical properties of semiconductors.

### Step 4: Evaluate Statement II
**Statement II:** "Semiconductors are of high purity."
- This statement is also true. For semiconductors to function effectively in electronic devices, they must be of high purity. Impurities can significantly affect their electrical characteristics.

**Hint:** Think about the applications of semiconductors in technology and why high purity is necessary.

### Conclusion
Both statements I and II are true. Therefore, the correct option is that both statements are true.

**Final Answer:** Both statements are true.