Match the compounds listed in colomn-I with characteristic(s) type
of reactions listed in column-II.
`{:("Column I","Column II"),((A)"Ionic hydrides",(p)B_2H_6","CH_4","H_2O","SiH_4),((B)"Covalent hydrides",(q)CuH","ZnH_2","CdH_2","HgH_2 ),(( C)"Metallic hydrides",(r)ScH_2","TiH_2","VH_2","ZrH_2),((D)"Intermediate hydrides",(s)NaH","KH","CaH_2","SrH_2):}`

Explanation

To solve the question of matching the compounds listed in Column I with the characteristic types of reactions in Column II, we will analyze each type of hydride and its corresponding examples.

### Step-by-Step Solution:

1. **Identify Ionic Hydrides (Column I - A)**:
- Ionic hydrides are formed by alkali metals (Group 1) and alkaline earth metals (Group 2).
- Examples include NaH, KH, CaH2, and SrH2.
- **Match**: A (Ionic hydrides) → S (NaH, KH, CaH2, SrH2)

2. **Identify Covalent Hydrides (Column I - B)**:
- Covalent hydrides are typically formed by P-block elements (Groups 13-18).
- Examples include B2H6 (diborane), CH4 (methane), H2O (water), and SiH4 (silane).
- **Match**: B (Covalent hydrides) → P (B2H6, CH4, H2O, SiH4)

3. **Identify Metallic Hydrides (Column I - C)**:
- Metallic hydrides are formed by D-block elements and are characterized by their metallic properties.
- Examples include ScH2, TiH2, VH2, and ZrH2.
- **Match**: C (Metallic hydrides) → R (ScH2, TiH2, VH2, ZrH2)

4. **Identify Intermediate Hydrides (Column I - D)**:
- Intermediate hydrides are formed by elements from Groups 11 and 12, and their properties are between ionic and covalent hydrides.
- Examples include CuH, ZnH2, CdH2, and HgH2.
- **Match**: D (Intermediate hydrides) → Q (CuH, ZnH2, CdH2, HgH2)

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