`{:("Column I","Column II"),("(A) Carbon tetrachloride + Toluene","(p) Shows positive deviation from ideal behaviour"),("(B) Chloroform + Benzene","(q) Shows negative deviation from ideal behaviour"),("(C) Carbon tetrachloride + Chloroform ","(r) Mixing is endothermic "),("(D) Benzene + Toluene","(s) Shows ideal behaviour"):}`

Answer

To solve the question, we need to match the solutions in Column I with their corresponding behaviors in Column II based on their interactions and deviations from ideal behavior. Let's analyze each pair step by step.

### Step 1: Analyze Carbon Tetrachloride + Toluene (A)
- **Behavior**: This mixture shows **positive deviation** from ideal behavior.
- **Reason**: The interactions between carbon tetrachloride (CCl₄) and toluene (C₇H₈) are weaker than the interactions between their own molecules (solute-solute and solvent-solvent).
- **Heat of Mixing**: The mixing is **endothermic** (absorbs heat).
- **Match**: (A) → (p) and (R)

### Step 2: Analyze Chloroform + Benzene (B)
- **Behavior**: This mixture shows **negative deviation** from ideal behavior.
- **Reason**: The interactions between chloroform (CHCl₃) and benzene (C₆H₆) are stronger than the interactions between their own molecules.
- **Heat of Mixing**: The mixing is **exothermic** (releases heat).
- **Match**: (B) → (q)

### Step 3: Analyze Carbon Tetrachloride + Chloroform (C)
- **Behavior**: This mixture shows **positive deviation** from ideal behavior.
- **Reason**: Similar to the first case, the interactions between CCl₄ and CHCl₃ are weaker than their own interactions.
- **Heat of Mixing**: The mixing is **endothermic**.
- **Match**: (C) → (p) and (R)

### Step 4: Analyze Benzene + Toluene (D)
- **Behavior**: This mixture shows **ideal behavior**.
- **Reason**: Benzene and toluene have similar types of interactions (both are aromatic hydrocarbons), so their interactions do not change significantly upon mixing.
- **Heat of Mixing**: The mixing is neither endothermic nor exothermic; it behaves ideally.
- **Match**: (D) → (s)

### Final Matches
- (A) → (p) and (R)
- (B) → (q)
- (C) → (p) and (R)
- (D) → (s)

### Summary of Answers
- (A) Carbon tetrachloride + Toluene → (p) Shows positive deviation from ideal behavior, (R) Mixing is endothermic.
- (B) Chloroform + Benzene → (q) Shows negative deviation from ideal behavior.
- (C) Carbon tetrachloride + Chloroform → (p) Shows positive deviation from ideal behavior, (R) Mixing is endothermic.
- (D) Benzene + Toluene → (s) Shows ideal behavior.