A) Ferrous chloride
B) Sodium carbonate
C) A mixture of ferrous and ferric hydroxides
D) Ferric chloride
Correct Answer: C
Solution :
[c] Rust is an iron oxide, usually red oxide formed by the redox reaction of iron and oxygen in the presence of water or air moisture. Rust consists of hydrated iron (III) oxides \[F{{e}_{2}}{{O}_{3}}^{.}n{{H}_{2}}O\] andiron (III) oxide-hydroxide (FeO(OH), \[Fe{{(OH)}_{3}})\].
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