Which of following is fast reaction?

Options

A. reaction between `H_(2)` and `O_(2)` from `H_(2)O`
B. reaction between acid and base to form salt and water
C. hydrolysis of ester
D. hydrolysis of sugar to glucoe

Answer

To determine which of the given reactions is the fastest, we need to analyze the nature of the reactions provided. Here’s a step-by-step solution:

### Step 1: Identify the Reactions
First, we need to identify the reactions presented in the question. Typically, these could include:
1. Reaction between hydrogen (H2) and oxygen (O2) to form water (H2O).
2. Reaction between an acid and a base to form salt and water.
3. Hydrolysis of an ester.
4. Hydrolysis of sugar to glucose.

### Step 2: Understand Reaction Types
Next, we need to understand the types of reactions:
- **Acid-Base Reactions**: These are generally very fast because they involve the transfer of protons (H+) between the acid and base, leading to the rapid formation of products.
- **Combustion Reactions**: The reaction between H2 and O2 is a combustion reaction, which can be fast but is not as fast as acid-base reactions.
- **Hydrolysis Reactions**: These involve breaking down compounds by reaction with water. They are usually slower than acid-base reactions.

### Step 3: Analyze Each Reaction
1. **H2 + O2 → H2O**: This is a combustion reaction but is not an acid-base reaction, so it is not the fastest.
2. **Acid + Base → Salt + Water**: This is an acid-base reaction and is typically the fastest among common reactions.
3. **Hydrolysis of Ester**: This reaction is slower than acid-base reactions.
4. **Hydrolysis of Sugar**: This reaction is also slower than acid-base reactions.

### Step 4: Conclusion
Based on the analysis, the fastest reaction among the options provided is the acid-base reaction, which produces salt and water.

### Final Answer
The fastest reaction is the reaction between an acid and a base to form salt and water.

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