In galvanisation, the zinc coating on iron mainly protects it from what?
Answer and explanation
Correct answer: Air and moisture
Galvanisation protects iron by covering it with a layer of zinc. This barrier prevents oxygen and moisture from reaching the iron surface, thereby stopping or greatly slowing the electrochemical reactions responsible for rusting. Therefore option A is correct. Light and sound do not cause rust, and soil alone is not the relevant chemical factor; moisture and oxygen are essential.
Frequently asked questions
What is the correct answer to this question?
Air and moisture
Why is this the correct answer?
Galvanisation protects iron by covering it with a layer of zinc. This barrier prevents oxygen and moisture from reaching the iron surface, thereby stopping or greatly slowing the electrochemical reactions responsible for rusting. Therefore option A is correct. Light and sound do not cause rust, and soil alone is not the relevant chemical factor; moisture and oxygen are essential.
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.
