A decomposition reaction is found to be first order with respect to the reactant. What is the relationship between the rate and the concentration of
the reactant?
A. The rate is directly proportional to the natural logarithm of the
concentration.
B. The rate is inversely proportional to the square of the
concentration.
C. The rate is directly proportional to the concentration.
D. The rate is inversely proportional to the common logarithm of the
concentration.

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.

Ithink that the answer is b