Assertion: `2H_2S_((g)) + O_( 2(g))to 2S_((s)) + 2H_2O_ ((l))`
It is an oxidation reaction.
Reason:Oxidation is a process which involves removal of hydrogen

Options

A. If both assertion and reason are time and reason is the correct explanation of assertion.
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
C. If assertion is true but reason is false.
D. If both assertion and reason are false.

Explanation

To analyze the assertion and reason provided in the question, we will break down the chemical reaction and the definitions involved in oxidation.

### Step-by-Step Solution:

1. **Identify the Reaction**:
The given reaction is:
\[ 2H_2S_{(g)} + O_2_{(g)} \rightarrow 2S_{(s)} + 2H_2O_{(l)} \]
Here, hydrogen sulfide (H₂S) reacts with oxygen (O₂) to produce sulfur (S) and water (H₂O).

2. **Determine Oxidation and Reduction**:
- **Oxidation** is defined as the loss of electrons or an increase in oxidation state. In organic reactions, it often involves the removal of hydrogen or the addition of oxygen.
- **Reduction** is the gain of electrons or a decrease in oxidation state, often involving the addition of hydrogen or the removal of oxygen.

3. **Analyze the Reactants and Products**:
- In the reactant H₂S, sulfur has an oxidation state of -2.
- In the product sulfur (S), the oxidation state is 0.
- The change in oxidation state from -2 to 0 indicates that sulfur is being oxidized (losing electrons).

4. **Identify the Role of Oxygen**:
- Oxygen (O₂) is being reduced in this reaction. The oxygen is gaining hydrogen from H₂S to form water (H₂O).
- This means that while sulfur is being oxidized, oxygen is being reduced.

5. **Conclusion on Assertion and Reason**:
- The assertion states that the reaction is an oxidation reaction, which is true because H₂S is losing hydrogen (and thus being oxidized).
- The reason states that oxidation involves the removal of hydrogen, which is also true in this context.
- Therefore, both the assertion and reason are correct.

### Final Answer:
Both the assertion and reason are true. The reaction is indeed an oxidation reaction as it involves the removal of hydrogen from H₂S.