Non-combustible hydride is

Options

A. `NH_(3)`
B. `PH_(3)`
C. `AsH_(3)`
D. `SbH_(3)`

Answer

To determine which of the given hydrides is non-combustible, we need to understand the definitions and properties of combustible and non-combustible hydrides.

### Step-by-Step Solution:

1. **Understanding Hydrides**:
- Hydrides are compounds formed between hydrogen and other elements. They can be classified based on their combustion properties.

2. **Defining Combustible and Non-combustible Hydrides**:
- **Combustible Hydrides**: These are hydrides that can burn in the presence of oxygen, producing heat and light.
- **Non-combustible Hydrides**: These are hydrides that do not burn in the presence of oxygen.

3. **List of Given Hydrides**:
- The hydrides provided in the question are:
- \( \text{NS}_3 \) (Nitrogen trihydride)
- \( \text{PH}_3 \) (Phosphine)
- \( \text{AsH}_3 \) (Arsine)
- \( \text{SbH}_3 \) (Stibine)
- \( \text{VH}_3 \) (Vanadium trihydride)

4. **Analyzing Each Hydride**:
- **\( \text{NS}_3 \)**: This is known to be non-combustible; it does not burn in air.
- **\( \text{PH}_3 \)**: This is a combustible hydride; it burns in air.
- **\( \text{AsH}_3 \)**: This is also a combustible hydride; it burns in air.
- **\( \text{SbH}_3 \)**: This is another combustible hydride; it burns in air.
- **\( \text{VH}_3 \)**: This is also considered combustible.

5. **Conclusion**:
- From the analysis, we conclude that the only non-combustible hydride from the options provided is \( \text{NS}_3 \).

### Final Answer:
The non-combustible hydride is \( \text{NS}_3 \).

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