Home › Tamil Nadu HSC (Class 12) › Chemistry › Metallurgy › Metallic zinc coated on iron to protect it from …
Metallic zinc coated on iron to protect it from rusting illustrates the process called
Aannealing
Bcalcination
Cliquation
Dgalvanising
Answer & Solution
Correct answer: D. galvanising
1. Zinc is more reactive than iron and forms a protective adherent oxide layer.
2. Coating iron/steel with zinc to prevent rusting is called **galvanising**.
3. Liquation and annealing are refining/heat-treatment terms, not corrosion protection.
_Source: Samacheer Kalvi Class 12 Chemistry Vol.1, Unit 1 'Metallurgy', §1.7 (Applications of Zn)_
Related questions
Germanium and silicon used as semiconductors are purified by zone refining becauseNickel is refined by heating the impure metal in a stream of CO to form a volatile carbonyFrom an Ellingham diagram at 1500 K, $\Delta G^\circ$ for $2Fe+O_2\rightarrow 2FeO$ is $-3From an Ellingham diagram, aluminium can reduce which of the following oxides?In an Ellingham diagram the line for the formation of carbon monoxide ($2C + O_2
ightarroAn Ellingham diagram is a plot ofIn the cyanide process, gold is recovered from the leached solution $[Au(CN)_2]^-$ by addiIn the electrolytic refining of copper, the anode and cathode are respectively