Question

The chain on a bicycle rusts faster when the bicycle is left outside in damp conditions. Which of the following factors affect the rate at which the bicycle chain rusts?
a) Surface area
b) concentration of oxygen atoms in air
c) temperature
d) all of the above
e) b and c
f) a and c
g) a and b

Answer 1

D
Larger surface area speeds up reactions 
Rust is an oxide so more oxygen should speed up rate of rust
Temperature also speeds up reactions

+ The humidity affects it aswell