`CH_3-CH_2-underset((X))(CH_2)-=N,CH_3-underset((Y))underset(CN)underset(|)(CH)-CH`
Relation between (X) and (Y) is

Options

A. Chain isomer
B. Positional isomer
C. Functional isomer
D. Metamers

Answer

To determine the relationship between (X) and (Y) in the given chemical structures, we need to analyze the molecular structures and identify the type of isomerism present.

### Step-by-Step Solution:

1. **Identify the Structures**:
- The first structure is CH₃-CH₂-(X)-(CH₂)=N-CH₃.
- The second structure is CH₃-CH-(Y)-CN.

2. **Count the Carbon Atoms**:
- In the first structure, we have:
- 3 Carbons from CH₃-CH₂ and CH₂.
- 1 Carbon from the nitrogen-containing group (N-CH₃).
- Total = 4 Carbons.
- In the second structure, we have:
- 3 Carbons from CH₃-CH and CN.
- Total = 4 Carbons.

3. **Analyze Functional Groups**:
- Both structures contain the same functional group (CN).
- The presence of the same functional group indicates that they cannot be functional isomers.

4. **Determine the Type of Isomerism**:
- Since both structures have the same molecular formula (C₄H₈N) and the same functional group, we need to check the arrangement of the carbon atoms.
- The first structure has a straight chain with a nitrogen group, while the second structure has a branched chain.

5. **Conclusion**:
- The difference in the arrangement of carbon atoms indicates that (X) and (Y) are chain isomers.
- Therefore, the relation between (X) and (Y) is that they are **chain isomers**.