Question

d) Four nails are added to four test tubes A, B, C, D as shown.
D
А
Boiled water
+ oil layer
B
Salt water
с
Moist air
Dry air
(i) Identify the test tube with the nail that would rust the least? Why?
(ii) Identify the test tube with the nail that would rust the fastest? Why?​

Answer 1

Answer:

In the D layer it will rust the least and in C layer rust the most

Explanation:

Rusting requires Both Oxygen and Water.( or Vapor ) In dry air it will have the least water so it will rust the least. In Moist air it will have the most oxygen and vapor so it will rust the most