**Checking Aromaticity in Fused Rings with One Aromatic and One Non-Aromatic Ring**

To determine whether a compound with fused rings is aromatic or not when one ring is aromatic and the other is not, we need to follow a set of rules known as the Huckel's rule. These rules help in determining the aromaticity of a compound based on its molecular structure and the number of π electrons.

**Huckel's Rule**
According to Huckel's rule, a compound is considered aromatic if it meets the following criteria:

1. The compound must be cyclic, meaning it forms a closed loop.
2. The compound must be planar, with all atoms lying in the same plane.
3. The compound must be fully conjugated, meaning all the atoms in the ring must be sp2 hybridized and have unhybridized p orbitals.
4. The compound must have 4n+2 π electrons, where n is an integer.

**Determining Aromaticity in Fused Rings**

When dealing with fused rings, we can evaluate the aromaticity of the compound by analyzing each ring individually and then considering their interaction.

1. **Analyze the Aromatic Ring**: Determine if the aromatic ring meets Huckel's rule. If it is cyclic, planar, and has 4n+2 π electrons, then it is considered aromatic.

2. **Analyze the Non-Aromatic Ring**: Determine if the non-aromatic ring meets Huckel's rule. If it does not have 4n+2 π electrons, it is considered non-aromatic.

3. **Consider the Interaction**: If the aromatic and non-aromatic rings are fused together, their interaction can affect the overall aromaticity of the compound. The interaction between the rings can lead to delocalization of the π electrons, resulting in a loss or gain of aromaticity.

4. **Evaluate the Overall Compound**: If the interaction between the rings disrupts the aromaticity of the compound, it may no longer be considered aromatic. The overall compound's aromaticity will depend on the extent of the interaction and the number of π electrons present in the fused system.

Therefore, the entire compound will only be aromatic if both rings individually meet Huckel's rule and the interaction between them does not disrupt the aromaticity. If the interaction results in the loss of aromaticity in either or both rings, the compound as a whole may not be aromatic.

(4n+2)electrons..no i think its not an aromatic if it is fused with non aromatic..bcz aromatic compound should hv cyclic /planar/it must satisfy huckel's rule ...non aromatic must violate any of these conditions...Iam not sure about the ans but i think it doesnot give aromatic...