Rusting of iron is the formation of
AIron sulphide FeS from iron and sulphur
BHydrated iron(III) oxide Fe2O3 . x H2O
CIron carbonate FeCO3 from iron and CO2
DIron chloride FeCl3 from iron and Cl2
Answer & Solution
Correct answer: B. Hydrated iron(III) oxide Fe2O3 . x H2O
1. The chapter section on corrosion describes rust formation.
2. Iron reacts with oxygen and water in the air.
3. The product is reddish-brown hydrated iron(III) oxide.
4. So option A is correct.
_Source: Selina Concise Chemistry Class 10, Ch 7 Metallurgy (Mistral OCR'd PDF), section on rusting_
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