Question

$\textbf{Match List I with List II}$
$\begin{array}{|c|c|c|} \hline \text{List I (Spectral Series for Hydrogen)} & \text{List II (Spectral Region/Higher Energy State)} \\ \hline \text{A. Lyman} & \text{I. Infrared region} \\ \text{B. Balmer} & \text{II. UV region} \\ \text{C. Paschen} & \text{III. Infrared region} \\ \text{D. Pfund} & \text{IV. Visible region} \\ \hline \end{array}$
$\text{Choose the correct answer from the options given below :-}$

• A. A-II, B-III, C-I, D-IV
• B. A-I, B-III, C-II, D-IV
• C. A-II, B-IV, C-III, D-I
• D. A-I, B-II, C-III, D-IV

Answer 1

The Correct Option is C

To solve this question, we must match each spectral series for the hydrogen atom from List I with the corresponding spectral region or higher energy state in List II. Here is the detailed explanation: 

1. Lyman Series (A): This series involves electronic transitions of hydrogen where the electron falls to the first energy level (n=1). The Lyman series is in the \(\text{UV region}\) because the transitions involve high energy. Thus, Lyman corresponds to \(\text{II. UV region}\).
2. Balmer Series (B): In this series, electrons transition to the second energy level (n=2). The Balmer series is observed in the \(\text{Visible region}\), as its wavelengths are within the visible spectrum. Hence, Balmer matches with \(\text{IV. Visible region}\).
3. Paschen Series (C): This series corresponds to electrons transitioning to the third energy level (n=3). The spectral lines of the Paschen series fall in the \(\text{Infrared region}\). Therefore, Paschen is matched with \(\text{III. Infrared region}\).
4. Pfund Series (D): Electrons in the Pfund series transition to the fifth energy level (n=5). The lines appear in the \(\text{Infrared region}\). Hence, Pfund corresponds to \(\text{I. Infrared region}\).

After matching each series with the respective spectral region, the correct option is:

List I (Spectral Series)	List II (Spectral Region)
A. Lyman	II. UV region
B. Balmer	IV. Visible region
C. Paschen	III. Infrared region
D. Pfund	I. Infrared region

Therefore, the correct answer is: A-II, B-IV, C-III, D-I.

Answer 2

The correct matching is as follows:

- A. Lyman series corresponds to the UV region (II) as it involves transitions to the \( n=1 \) energy level.  
- B. Balmer series corresponds to the Visible region (IV) as it involves transitions to the \( n=2 \) energy level.  
- C. Paschen series corresponds to the Infrared region (III) as it involves transitions to the \( n=3 \) energy level.  
- D. Pfund series corresponds to the Infrared region (I) as it involves transitions to the \( n=5 \) energy level. 

The Correct Answer is: \( A - II, B - IV, C - III, D - I \)