Which group elementof d-block do not form hydride at all?

Options

A. (A) 7
B. (B) 8
C. (C) 9
D. (D) 10

Answer

To determine which group elements of the d-block do not form hydrides at all, we can follow these steps:

### Step 1: Understand the Types of Hydrides
There are three main types of hydrides:
1. Ionic Hydrides
2. Covalent Hydrides
3. Metallic Hydrides

### Step 2: Identify the Groups in the d-Block
The d-block elements are divided into several groups. The relevant groups for this question are:
- Group 6
- Group 7
- Group 8
- Group 9

### Step 3: Analyze the Formation of Hydrides
- **Group 6**: These elements can form hydrides.
- **Group 7, 8, and 9**: These groups do not form hydrides. The reason is that the metals in these groups do not have a strong affinity for hydrogen in their normal oxidation states.

### Step 4: Conclusion
Based on the analysis, the d-block groups that do not form hydrides at all are:
- Group 7
- Group 8
- Group 9

### Final Answer
The elements of the d-block that do not form hydrides at all are from Group 7, Group 8, and Group 9.

---