Which of the following statements is correct?

Options

A. Hydrides of group 13 act as Lewis acids
B. Hydrides of group 14 are electron
C. Hydrides of group 14 act as lewis acids
D. Hydrides of group 15 act as Lewis bases

Explanation

To solve the question regarding which statements about hydrides are correct, we will analyze each statement one by one based on the properties of the hydrides from different groups in the periodic table.

### Step-by-Step Solution:

1. **Statement 1: Hydrides of group 13 act as Lewis acids.**
- Group 13 includes elements like boron (B), aluminum (Al), etc. The simplest hydride of boron is BH3. Boron has only three valence electrons and forms three bonds with hydrogen, resulting in only six electrons around it. This makes BH3 electron deficient, allowing it to accept electron pairs. Therefore, this statement is **correct**.

2. **Statement 2: Hydrides of group 14 are electron-rich.**
- Group 14 includes elements like carbon (C), silicon (Si), etc. The simplest hydride in this group is methane (CH4). Carbon has four valence electrons and forms four bonds with hydrogen, resulting in a complete octet (eight electrons). Since methane has no extra electrons and is electron precise, this statement is **incorrect**.

3. **Statement 3: Hydrides of group 14 act as Lewis acids.**
- As established, methane (CH4) has a complete octet and does not have any tendency to accept electrons or act as a Lewis acid. Therefore, this statement is also **incorrect**.

4. **Statement 4: Hydrides of group 15 act as Lewis bases.**
- Group 15 includes elements like nitrogen (N), phosphorus (P), etc. The simplest hydride is ammonia (NH3). Nitrogen has five valence electrons and forms three bonds with hydrogen, leaving one lone pair of electrons. This lone pair can be donated, allowing ammonia to act as a Lewis base. Therefore, this statement is **correct**.

### Conclusion:
Based on the analysis:
- Statement 1 is correct.
- Statement 2 is incorrect.
- Statement 3 is incorrect.
- Statement 4 is correct.

Thus, the correct statements are **1 and 4**.