From the data given below which of the following reactant is most effective drying agent at `0^(@)C`. Given `P_(H_(2)O)^(@)=4.58 mm` at `0^(@)C`.
i. `SrCl_(2).6H_(2)O(s) hArr SrCl_(2).2H_(2)O(s)+4H_(1)O(g), K_(p)=6.9xx10^(-12) atm^(4)`
ii. `Na_(2)SO_(4).10H_(2)O(s) hArr Na_(2)SO_(4)(s)+10H_(2)O(g), K_(p)=4.08xx10^(-25) atm^(10)`
iii. `Na_(2)HPO_(4). 12H_(2)O(s) hArr Na_(2)HPO_(4). 7H_(2)O(s)+5H_(2)O(g), K_(p)=5.525xx10^(-13) atm^(5)`

Explanation

To determine which of the given reactants is the most effective drying agent at 0°C, we need to compare the partial pressures of water vapor produced in each reaction with the given partial pressure of water at 0°C, which is 4.58 mm (or approximately 0.00602 atm).

### Step-by-Step Solution:

1. **Convert the given partial pressure of water:**
- The given partial pressure of water at 0°C is 4.58 mm. To convert this to atm:
\[
P_{H_2O} = \frac{4.58 \text{ mm}}{760 \text{ mm/atm}} \approx 0.00602 \text{ atm}
...