Why does the likelihood of rusting increase when the zinc coating in galvanisation is removed?
Answer and explanation
Correct answer: Iron comes into direct contact with air and moisture
In galvanisation, the zinc coating prevents iron from coming into direct contact with oxygen in air and moisture. When the coating is removed, iron is exposed and can be oxidised in the presence of oxygen and water, causing rusting. Therefore, option A is correct. Option B is incorrect because a removed zinc coating does not reform on its own.
Frequently asked questions
What is the correct answer to this question?
Iron comes into direct contact with air and moisture
Why is this the correct answer?
In galvanisation, the zinc coating prevents iron from coming into direct contact with oxygen in air and moisture. When the coating is removed, iron is exposed and can be oxidised in the presence of oxygen and water, causing rusting. Therefore, option A is correct. Option B is incorrect because a removed zinc coating does not reform on its own.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
