Benzene easily shows

Options

A. ring fission reactions since it is unstable
B. addition reactions since it is unsaturated
C. electrophilic substitution reactions due to stable ring and high `pi` electron density
D. nucleophilic substitution reactions due to stable ring and minimum electron density.

Answer

To solve the question "Benzene easily shows," we need to analyze the options provided and determine which reactions benzene can undergo based on its structure and properties.

### Step-by-Step Solution:

1. **Understanding Benzene Structure**:
- Benzene (C₆H₆) is a cyclic hydrocarbon with a ring of six carbon atoms, each bonded to one hydrogen atom.
- It has alternating double bonds, but due to resonance, the electrons are delocalized, making benzene very stable.

**Hint**: Remember that benzene is an aromatic compound with a unique structure that contributes to its stability.

2. **Evaluating Ring Fission Reaction**:
- A ring fission reaction involves breaking the benzene ring. However, benzene is very stable due to resonance and does not easily undergo ring fission.
- Therefore, this option is incorrect.

**Hint**: Consider the stability of benzene and its aromatic nature when thinking about reactions that involve breaking the ring.

3. **Evaluating Addition Reactions**:
- Benzene can theoretically undergo addition reactions due to its unsaturation (presence of double bonds). However, due to the delocalization of π electrons, it prefers to undergo substitution reactions instead.
- Thus, benzene does not easily show addition reactions like alkenes do.

**Hint**: Think about how the delocalized electrons in benzene affect its reactivity compared to alkenes.

4. **Evaluating Electrophilic Substitution Reaction**:
- Benzene readily undergoes electrophilic substitution reactions. In these reactions, an electrophile replaces one of the hydrogen atoms on the benzene ring.
- The high electron density in the π system makes it susceptible to attack by electrophiles, leading to the formation of a carbocation intermediate.

**Hint**: Focus on how the high electron density in benzene makes it reactive towards electrophiles.

5. **Evaluating Nucleophilic Substitution Reaction**:
- Benzene does not undergo nucleophilic substitution reactions because nucleophiles also have high electron density. The electron-rich nature of benzene makes it less likely to react with other electron-rich species.
- Therefore, this option is incorrect.

**Hint**: Recall that nucleophiles require a substrate that can accommodate their electron density, which benzene cannot due to its stability.

### Conclusion:
Based on the analysis, the correct answer is that benzene easily shows **electrophilic substitution reactions** due to its stable aromatic structure and high π electron density.

### Final Answer:
Benzene easily shows **electrophilic substitution reactions**.