What is the similarity between galvanisation and painting?
Answer and explanation
Correct answer: Both prevent rusting by protecting the iron surface from contact with air and moisture.
Rusting requires iron to come into contact with oxygen and moisture in air. In galvanisation, iron is coated with zinc, whereas in painting it is coated with paint. Both coatings act as barriers between the iron surface and air and moisture, thereby preventing rusting. Option B is incorrect because paint is not a coating of a reactive metal.
Frequently asked questions
What is the correct answer to this question?
Both prevent rusting by protecting the iron surface from contact with air and moisture.
Why is this the correct answer?
Rusting requires iron to come into contact with oxygen and moisture in air. In galvanisation, iron is coated with zinc, whereas in painting it is coated with paint. Both coatings act as barriers between the iron surface and air and moisture, thereby preventing rusting. Option B is incorrect because paint is not a coating of a reactive metal.
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.
