Statement `:` Due to Frenkel defect the density of the crystalline solid remains same.
Explanation `:` In Frenkel defect, no cations or anions leave the lattice.

Options

A. If both the statement are TRUE and STATEMENT -2 is the correct explanation of STATEMENT -1
B. If both the statement are TRUE and STATEMENT -2 is NOT the correct explanation of STATEMENT -1
C. If STATEMENT -1is TRUE and STATEMENT -2 is FALSE
D. If STATEMENT -1 is FALSE and STATEMENT -2 is TRUE

Answer

To solve the question regarding the statement and explanation about the Frenkel defect, we will break it down step by step.

### Step 1: Understand the Frenkel Defect
The Frenkel defect is a type of point defect in a crystalline solid where an ion (usually a cation) leaves its normal lattice position and occupies an interstitial site. This defect does not involve the loss of ions from the crystal; rather, it results in a vacancy where the ion was originally located.

**Hint:** Remember that the Frenkel defect involves the movement of ions within the lattice but does not result in the loss of ions.

### Step 2: Analyze the Statement
The statement claims that "due to Frenkel defect the density of the crystalline solid remains the same." To evaluate this, we need to consider how the density of a solid is calculated. Density is defined as mass per unit volume. In the case of a Frenkel defect, since no ions are lost from the lattice, the overall mass of the solid remains unchanged.

**Hint:** Consider how density is affected by mass and volume. If mass remains constant and volume does not change significantly, density will remain the same.

### Step 3: Evaluate the Explanation
The explanation states that "in Frenkel defect, no cations or anions leave the lattice." This is accurate because, in a Frenkel defect, while cations may shift to interstitial sites, they do not leave the crystal structure entirely. Therefore, the number of ions in the lattice remains constant, supporting the idea that the density does not change.

**Hint:** Focus on the movement of ions within the lattice and how it affects the overall structure.

### Step 4: Conclusion
Since both the statement and the explanation are correct, we conclude that the statement "due to Frenkel defect the density of crystalline solid remains the same" is true, and the explanation provided is a valid reason for this phenomenon.

**Final Answer:** Both the statement and the explanation are correct.

### Summary of Steps:
1. Understand the definition of the Frenkel defect.
2. Analyze the statement about density.
3. Evaluate the explanation regarding ion movement.
4. Conclude that both the statement and explanation are correct.