STATEMENT-1: Line emission spectra useful in the study of atomic. Structure.
STATEMENT-2: Each element has a unique line emission spectrum.

Options

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

Answer

To analyze the given statements, we will evaluate each statement step by step.

### Step 1: Evaluate Statement 1
**Statement 1:** Line emission spectra are useful in the study of atomic structure.

**Explanation:**
Line emission spectra are produced when electrons in an atom transition between energy levels. When an electron drops from a higher energy level to a lower one, it emits energy in the form of light. The wavelengths of this emitted light appear as distinct lines on a spectrum, known as the line emission spectrum. This spectrum is characteristic of the element and provides information about the energy levels of the electrons in the atom, thereby aiding in the understanding of atomic structure.

### Step 2: Evaluate Statement 2
**Statement 2:** Each element has a unique line emission spectrum.

**Explanation:**
Each element has a unique atomic structure, which means it has a specific arrangement of electrons and energy levels. As a result, the transitions between these energy levels will produce light of specific wavelengths that are unique to that element. This uniqueness allows scientists to identify elements based on their line emission spectra. For example, hydrogen has a distinct line emission spectrum that is different from that of helium or any other element.

### Step 3: Conclusion
Both statements are true:
- **Statement 1** is true because line emission spectra provide valuable insights into atomic structure.
- **Statement 2** is true because each element's unique atomic structure results in a unique line emission spectrum.

Moreover, **Statement 2** serves as a correct explanation for **Statement 1** since the uniqueness of the line emission spectrum for each element is what makes it useful in studying atomic structure.

### Final Answer:
Both statements are true, and Statement 2 is the correct explanation of Statement 1.

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