7.93 When n-butyl bromide is treated with sodium iodide (Na ) in ethanol (EtOH), the concentration of iodide quickly decreases, but then slowly returns to its original concentration. Provide an explanation for these observations, and identify the final product of the reaction.

The answer is probably c. xylem

You would be correct, boiling water does disinfect contamination.    the property of disinfecting means to kill  germs, bacteria and other pathogens or contamination  that might cause an infection or cause a person to become sickly. a couple methods of disinfecting are using soap, other cleaning supplies or by simply "boiling" the contaminate.  the reason why boiling water disinfects certain attributes is because some cells cannot survive the heat and pressure.