Which among the following reactions is can be a example of pseudo first order reaction?

Options

A. Inversion of cane sugar
B. Decomposition of `H_(2)O_(2)`
C. Conversion of cyclopropane to propene
D. Decomposition of `N_(2)O_(5)`

Answer

To determine which of the given reactions can be an example of a pseudo first-order reaction, we first need to understand what a pseudo first-order reaction is.

### Step-by-Step Solution:

1. **Definition of Pseudo First-Order Reaction**:
- A pseudo first-order reaction occurs when a reaction that is actually of a higher order (usually second order) appears to be first-order due to the presence of an excess amount of one of the reactants.

2. **Understanding the Role of Excess Reactant**:
- In a pseudo first-order reaction, one reactant is present in a much larger concentration compared to the other reactant. This means that the concentration of the excess reactant remains relatively constant throughout the reaction, allowing us to simplify the rate equation.

3. **Example of Pseudo First-Order Reaction**:
- A classic example of a pseudo first-order reaction is the hydrolysis of cane sugar (sucrose) in the presence of water. The reaction can be represented as:
\[ C_{12}H_{22}O_{11} + H_2O \rightarrow C_6H_{12}O_6 + C_6H_{12}O_6 \]
- In this reaction, sucrose reacts with water to produce glucose and fructose. If water is present in excess, the reaction behaves as if it is first-order with respect to sucrose.

4. **Conclusion**:
- Since the hydrolysis of cane sugar in the presence of excess water is an example of a reaction that is second order but behaves as first order due to the excess of water, we conclude that this is indeed a pseudo first-order reaction.

5. **Final Answer**:
- Therefore, the correct option is the inversion of cane sugar.