In condcutors, the gap between filled valence band and empty conduction band is very large.

Answer

To solve the question, we need to analyze the statement regarding the band gap in conductors. Here’s a step-by-step solution:

### Step 1: Understand the Concept of Band Gap
In solid-state physics, the band gap refers to the energy difference between the valence band (filled with electrons) and the conduction band (where electrons can move freely and conduct electricity).

### Step 2: Classify Materials Based on Band Gap
1. **Conductors**: In conductors (like metals), the valence band and conduction band overlap, meaning there is no energy gap between them. Therefore, the band gap is effectively **zero**.
2. **Semiconductors**: In semiconductors (like silicon), the band gap is relatively small, typically around **1 eV**.
3. **Insulators**: In insulators (like rubber), the band gap is large, usually greater than **5 eV**.

### Step 3: Analyze the Given Statement
The statement given in the question is: "In conductors, the gap between filled valence band and empty conduction band is very large."

### Step 4: Evaluate the Truth of the Statement
Since we established that conductors have a **zero band gap**, the statement that the gap is "very large" is incorrect.

### Conclusion
The correct conclusion is that the statement is **false** because conductors do not have a large band gap; they have no band gap at all.

### Final Answer
The statement is false; in conductors, the band gap is zero.

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