Give reasons in two or three sentences only for the following: Phenul group is known to exert negative inductive effect, but each phenyl ring in biphenyl `(C_(6)H_(5)-C_(6)H_(5))` is more reactive than benzene towards electrophilic substitution.

Explanation

**Step-by-Step Text Solution:**

1. **Understanding the Phenyl Group's Inductive Effect**: The phenyl group (C6H5) is known to exert a negative inductive effect due to the presence of the electronegative carbon atoms in the aromatic ring, which can withdraw electron density from adjacent atoms or groups.

2. **Reactivity of Biphenyl**: In biphenyl (C6H5-C6H5), each phenyl ring can influence the reactivity of the other. One phenyl ring can act as an electron donor, while the other can act as an electron acceptor. This interaction enhances the overall electron density on the rings.

3. **Conclusion on Electrophilic Substitution**: As a result of this electron donation and the increased electron density, the phenyl rings in biphenyl become more reactive towards electrophilic substitution reactions compared to benzene, which does not have this additional interaction.