According to IUPAC system, `CH_3 CH_2 CN` is named as ...... while `CH_3 CH_2 N overset(to )=` C is named as .....

Explanation

To solve the question, we need to determine the IUPAC names of the two given organic compounds: `CH3CH2CN` and `CH3CH2N≡C`.

### Step-by-Step Solution:

1. **Identify the first compound: `CH3CH2CN`**
- Count the carbon atoms in the longest continuous chain. Here, we have:
- 1 carbon from `CH3` (methyl group)
- 1 carbon from `CH2` (methylene group)
...