Question

Boojho’s father got transferred from Rajasthan to Mumbai. When Boojho was
in Rajasthan he had bought a second hand bicycle which had few scratches on it. In
Mumbai, he enjoyed riding it on the sea beach almost everyday. However after a
month he found that a brownish layer had developed on the scratches. Can you help
Boojho to
a. Identify what is this brown layer? Give a chemical equation for it.
b. Why was this layer not formed in Rajasthan?
c. Suggest him two ways to avoid this.

Answer 1

name of the chapter please