Statement-I : Germanium is preferred over silicon for making semiconductor devices
Statement-II : Energy gap for Ge is more than that of `SI`

Options

A. Statetment-I is True, Statement-II is True , Statement-II is a correct explanation for Statement-I
B. Statement-I is True, Statement-II is True , Statement-II is NOT a correct explanation for Statement-I
C. Statement-I is True, Statement-II is False
D. Statement-I is False, Statement-II is False

Answer

To solve the question, we need to analyze both statements provided:

**Statement-I**: Germanium is preferred over silicon for making semiconductor devices.
**Statement-II**: Energy gap for Ge is more than that of Si.

### Step 1: Analyze Statement-I
- Germanium (Ge) and Silicon (Si) are both semiconductors, but they have different properties.
- Silicon is generally preferred for making semiconductor devices because it has a higher thermal stability and a lower temperature coefficient compared to germanium. This means that silicon devices can operate effectively over a wider range of temperatures without degrading.
- Therefore, **Statement-I is false** because silicon is preferred over germanium for semiconductor devices.

### Step 2: Analyze Statement-II
- The energy gap (bandgap) is a crucial property of semiconductors that determines their electrical conductivity and other characteristics.
- The energy gap for germanium is approximately 0.7 eV, while for silicon, it is about 1.1 eV.
- Since the energy gap for silicon is greater than that of germanium, **Statement-II is also false**.

### Conclusion
Both statements are false. Thus, the correct option is that both Statement-I and Statement-II are false.

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