Match the reactions given in Column I with the reaction types in Column II.
| Column I | Column II | ||
|---|---|---|---|
| A. | $\mathrm{CH}_2==\mathrm{CH}_2+\mathrm{H}_2 \mathrm{O} \xrightarrow{\mathrm{H}^{+}} \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{OH}$ | 1. | Hydrogenation |
| B. | $\mathrm{CH}_2==\mathrm{CH}_2+\mathrm{H}_2 \xrightarrow{\mathrm{Pd}} \mathrm{CH}_3-\mathrm{CH}_3$ | 2. | Halogenation |
| C. | $\mathrm{CH}_2==\mathrm{CH}_2+\mathrm{Cl}_2 \longrightarrow \mathrm{Cl}-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{Cl}$ | 3. | Polymerisation |
| D. | $3 \mathrm{CH} \equiv \equiv\mathrm{CH} \xrightarrow[\text { Heat }]{\text { Cutube }} \mathrm{C}_6 \mathrm{H}_6$ | 4. | Hydration |
| 5. | Condensation |
A - (4), B - (1), C - (2), D - (3)
| Reactions | Types of reaction | |
|---|---|---|
| A. | $\mathrm{CH}_2==\mathrm{CH}_2+\mathrm{H}_2 \mathrm{O} \xrightarrow{\mathrm{H}^{+}} \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{OH}$ | Hydration Addition of water |
| B. | $\mathrm{CH}_2==\mathrm{CH}_2+\mathrm{H}_2 \xrightarrow{\mathrm{Pd}} \mathrm{CH}_3-\mathrm{CH}_3$ | Hydrogenation Addition of hydrogen |
| C. | $\mathrm{CH}_2==\mathrm{CH}_2+\mathrm{Cl}_2 \longrightarrow \mathrm{Cl}-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{Cl}$ | Halogenation Addition of halogen |
| D. | $3 \mathrm{CH} \equiv \equiv\mathrm{CH} \xrightarrow[\text { Heat }]{\text { Cutube }} \mathrm{C}_6 \mathrm{H}_6$ | Polymerisation |
 |
Assertion (A) The compound tetraene has the following structural formula.
It is cyclic and has conjugated $8 \pi$-electron system but it is not an aromatic compound. Reason (R) $(4 n+2) \pi$ electrons rule does not hold good and ring is not planar.
Assertion (A) Toluene on Friedal Crafts methylation gives $o$ - and $p$ xylene. Reason (R) $\mathrm{CH}_3$-group bonded to benzene ring increases electron density at $o$ - and $p$ - position.
Assertion (A) Nitration of benzene with nitric acid requires the use of concentrated sulphuric acid.
Reason (R) The mixture of concentrated sulphuric acid and concentrated nitric acid produces the electrophile, $\mathrm{NO}_2^{+}$.
Assertion (A) Among isomeric pentanes, 2, 2-dimethylpentane has highest boiling point.
Reason (R) Branching does not affect the boiling point.