The process of coating iron/steel articles with a thin layer of zinc to prevent rusting is called
A{'text': 'Alloying', 'label': 'A'}
B{'text': 'Galvanisation', 'label': 'B'}
C{'text': 'Electroplating with copper', 'label': 'C'}
D{'text': 'Vulcanisation', 'label': 'D'}
Answer & Solution
Correct answer: B. {'text': 'Galvanisation', 'label': 'B'}
1. Rusting requires water and oxygen contact with iron.
2. Galvanisation coats iron with a zinc layer.
3. Even if the coating is scratched, zinc is more reactive than iron and gets oxidised first (sacrificial protection).
4. This protects the underlying iron effectively; used for pipes, buckets, wires.
_Source: NCERT Class 10 Science, Ch 3 "Metals and Non-metals", §3.3_
Related questions
What are the elements that fit neither the metals nor the non-metals called?Where on the periodic table are most of the metals found?Galvanisation protects iron and steel from rusting by coating them with a thin layer ofWhy do ionic compounds such as NaCl conduct electricity in the molten state but not when sAn element reacts with oxygen to give an oxide with a high melting point that is also soluFood cans are coated with tin rather than zinc becauseBrass is an alloy ofIn the experiment on rusting, iron nails rust only in the test tube where the nails are ex