Four separate drops of 1-chlorobutane, 1-bromobutane and 1-iodobutane are each introduced into three test-tubes containing $1.0\,\text{cm}^3$ of aqueous silver nitrate at $60^\circ\text{C}$. In each instance, hydrolysis occurs. $\text{H}_2\text{O(l)} + \text{R-X(l)} + \text{Ag}^+\text{(aq)} \rightarrow \text{R-OH(aq)} + \text{AgX(s)} + \text{H}^+\text{(aq)}$. $\text{R}$ represents $\text{C}_4\text{H}_9$ and $\text{X}$ represents the halogen atom. The rate at which cloudiness forms in the test-tubes is in the order $\text{RCl} < \text{RBr} < \text{RI}$. Why does this happen?
- AThe bond energy of $\text{R-X}$ decreases from $\text{RCl}$ to $\text{RI}$.
- BThe first ionisation energy of the halogen decreases from $\text{Cl}$ to $\text{I}$.
- CThe solubility of $\text{AgX(s)}$ decreases from $\text{AgCl}$ to $\text{AgI}$.
- DThe $\text{R-X}$ bond polarity decreases from $\text{RCl}$ to $\text{RI}$.