`{:(,"Column I",,"Column II"),((A),"Shows inert pair effect",(p),"InCl"),((B),"Shows " ppi-ppi " back bonding",(q),Ga),((C),"Shows disproportionation reaction",(r ),Na(SiH_(3))_(3)),((D),"Shows " ppi-dpi " back bonding",(s),BF_(3)):}`

Options

A. A-p,B-r,C-q,D-s
B. A-r,B-p,C-q,D-s
C. A-q,B-s,C-p,D-r
D. A-s,B-q,C-p,D-r

Answer

To solve the question, we need to match the statements in Column I with the appropriate compounds in Column II based on their chemical properties. Let's analyze each statement and find the correct match step by step.

### Step 1: Analyze the first statement
**Statement A: Shows inert pair effect**
- The inert pair effect is commonly observed in heavier p-block elements, particularly in the post-transition metals and some metalloids. This effect is most pronounced in elements like lead (Pb) and thallium (Tl).
- **Match:** The compound that shows the inert pair effect is **(q) InCl** (Indium Chloride).

### Step 2: Analyze the second statement
**Statement B: Shows "ppi-ppi" back bonding**
- "Ppi-ppi" back bonding typically occurs in compounds where there is a presence of p-orbitals that can overlap. A classic example is boron trifluoride (BF3), where the boron atom can accept electron density from the p-orbitals of fluorine.
- **Match:** The compound that shows "ppi-ppi" back bonding is **(s) BF3**.

### Step 3: Analyze the third statement
**Statement C: Shows disproportionation reaction**
- A disproportionation reaction is a type of redox reaction where a single substance is both oxidized and reduced to form two different products. Sodium silicide (NaSiH3) can undergo disproportionation to form sodium and silane (SiH4).
- **Match:** The compound that shows a disproportionation reaction is **(r) Na(SiH3)3**.

### Step 4: Analyze the fourth statement
**Statement D: Shows "ppi-dpi" back bonding**
- "Ppi-dpi" back bonding occurs when there is a p-orbital from one atom overlapping with a vacant d-orbital of another atom. This is commonly seen in compounds like indium chloride (InCl), where the p-orbital of indium can overlap with the vacant d-orbital of chlorine.
- **Match:** The compound that shows "ppi-dpi" back bonding is **(p) Ga** (Gallium).

### Final Matching
Now we can summarize the matches:
- A → (q) InCl
- B → (s) BF3
- C → (r) Na(SiH3)3
- D → (p) Ga

### Final Answer
- A → Q
- B → S
- C → R
- D → P