Chemistry 溫習題目 4

The handlebar, frame and chain of a bicycle are prevented from rusting by different methods.
a) State the essential conditions for the rusting of iron.
b) Explain how the painting on the frame can prevent the frame from rusting.
c) The handlebar is coated with plastic to prevent it from rusting.
(i) State one advantage of coating the handlebar with plastic in rust prevention.
(ii) State one disadvantage of coating the handlebar with plastic in rust prevention.
d) Suggest a method that prevents the chain in the bicycle from rusting. Explain your choice.
e) Explain why the bicycle rusts faster when it is usually placed near the seashore.