question_answer 37)

                  When air is pumped into a cycle tyre the volume and pressure of the air in the tyre both are increased. What about Boyle's law in this case?

Answer:

                  Boyle's law is valid only if number of molecules in the chamber remain the same. However, when air is pumped into the tyre cycle, number of air molecules increased. Hence, Boyle's law is not valid.