Consider the heterogeneous equilibrium
`CaCO_3(s) hArr CaO(s) +CO_2(g) k_p=4 xx 10^(-2)` atm ……….(i)
`C(s) +CO_2(g) hArr 2CO(g) K_p=2.0` atm ………(ii)
Calculate the partial pressure of CO(g) when `CaCO_3` and C are mixed and allowed to attain equilibrium at the temperature for which the above two equilibria have been studied.

Explanation

To solve the problem of finding the partial pressure of CO(g) when CaCO₃ and C are mixed and allowed to attain equilibrium, we will use the provided equilibrium constants and the principles of chemical equilibrium.

### Step-by-Step Solution:

1. **Write the Equilibrium Expressions**:
- For the first reaction:
\[
\text{CaCO}_3(s) \rightleftharpoons \text{CaO}(s) + \text{CO}_2(g) \quad K_p = 4 \times 10^{-2} \text{ atm}
...