Match the following.

Options

A. `{:(Column-I,Column-II),(("Reactions"),"(Characteristrics)"),(CH_(3)CH_(2)CH=CH_(2)overset(HBr)rarr,(p)"Bimolecular"):}`
B. `{:(Column-I,Column-II),(("Reactions"),"(Characteristrics)"),(CH_(3)CH_(2)CH=CH_(2)overset(HBr"Peroxide")rarr,(q)"Carbocation intermediate"):}`
C. `{:(Column-I,Column-II),(("Reactions"),"(Characteristrics)"),(PhCH(CH_(3))OHoverset(SOCI_(2))rarr,(r)"Regioselective"):}`
D. `{:(Column-I,Column-II),(("Reactions"),"(Characteristrics)"),(PhCH(CH_(3))OHoverset(HBr)rarr,(t)"Stereospecific reaction"):}`

Answer

To solve the matching question, we need to analyze each reaction in Column 1 and determine its corresponding characteristic from Column 2. Here’s a step-by-step breakdown:

### Step 1: Analyze the First Reaction (Alkene + HBr)
- **Reaction**: Alkene reacts with HBr.
- **Mechanism**: Follows Markovnikov's rule.
- **Intermediate**: Carbocation is formed.
- **Match**: This corresponds to option **Q** (carbocation intermediate).

### Step 2: Analyze the Second Reaction (Alkene + HBr in Presence of Peroxide)
- **Reaction**: Alkene reacts with HBr in the presence of peroxide.
- **Mechanism**: Follows anti-Markovnikov rule due to free radical mechanism.
- **Product Formation**: A primary radical is formed, leading to one major product.
- **Match**: This corresponds to option **T** (stereospecific reaction).

### Step 3: Analyze the Third Reaction (Alcohol + SOCl2)
- **Reaction**: Alcohol reacts with SOCl2.
- **Mechanism**: Substitution reaction that follows SN2 mechanism.
- **Rate Dependence**: The rate depends on the concentration of both alcohol and SOCl2, indicating a bimolecular reaction.
- **Match**: This corresponds to option **P** (bimolecular).

### Step 4: Analyze the Fourth Reaction (Alcohol + HBr)
- **Reaction**: Alcohol reacts with HBr.
- **Type of Alcohol**: Secondary alcohol.
- **Mechanism**: Substitution reaction leading to the formation of a secondary carbocation.
- **Product Formation**: This reaction is stereospecific as it leads to the formation of one major product.
- **Match**: This corresponds to option **R** (stereospecific reaction).

### Summary of Matches:
1. Alkene + HBr → **Q** (carbocation intermediate)
2. Alkene + HBr (with peroxide) → **T** (stereospecific reaction)
3. Alcohol + SOCl2 → **P** (bimolecular)
4. Alcohol + HBr → **R** (stereospecific reaction)

### Final Matching:
1. **First Reaction**: Q
2. **Second Reaction**: T
3. **Third Reaction**: P
4. **Fourth Reaction**: R