Match
`{:("Column I","Column II"),((A)"Sheet silicate",(p)"Contain Si-O-Si bond"),((B)"Silicone",(q)"General formula" (SiO_3)_(n)^(-2n)),(( C)"Cyclic silicates",(r)Si_2O_7^(-6)),((D)"Pyro silicate",(s)(Si_2O_5)_n^(-2n)):}`

Explanation

To solve the matching question between Column I and Column II, we will analyze each item in Column I and find its corresponding match in Column II based on the definitions and characteristics of each type of silicate.

### Step-by-Step Solution:

1. **Identify Sheet Silicate (A)**:
- Sheet silicates have a structure where tetrahedra share three corners.
- The general formula for sheet silicates is Si2O5, which can be represented as (Si2O5)^(2n)^(-2n).
- **Match**: A → S (Contain Si-O-Si bond).

2. **Identify Silicone (B)**:
- Silicone refers to synthetic organosilicon polymers that contain repeated units of R2SiO.
- These polymers are characterized by Si-O-Si linkages.
- **Match**: B → P (Contain Si-O-Si bond).

3. **Identify Cyclic Silicates (C)**:
- Cyclic silicates are formed when tetrahedra share two oxygen atoms to create closed rings.
- The general formula for cyclic silicates is SiO3^(2-) or SiO3^(n)(2n)^(-).
- **Match**: C → Q (General formula SiO3^(2-) or SiO3^(n)(2n)^(-)).

4. **Identify Pyrosilicates (D)**:
- Pyrosilicates consist of two SiO4 tetrahedra sharing one corner.
- The general formula for pyrosilicates is Si2O7^(6-).
- **Match**: D → R (Si2O7^(6-)).

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