The following two reaction can occur during electrolysis of aqueous sodium chloride solution
`Na^(+)(aq)+E^(-)rarrNa(s)E^(@)=-2.71 V`
`2H_(2)O(l)+2E^(-)rarrH_(2)(g)+2 OH^(@)(aq)E^(@)=-0.83 V`
Which reaction takes place preferentially and why ?

Explanation

To determine which reaction takes place preferentially during the electrolysis of aqueous sodium chloride solution, we need to analyze the given reduction potentials of the two reactions.

### Step-by-Step Solution:

1. **Identify the Reactions and Their Reduction Potentials**:
- The first reaction is:
\[
\text{Na}^+(aq) + e^- \rightarrow \text{Na}(s) \quad E^\circ = -2.71 \, \text{V}
...