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Q.

$F e (i r o n) + O_{2} (o x y g e n) + H_{2} O (w a t e r) \to r u s t$ . The formula of rust is

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a

F e_{2} O_{3} . X H_{2} O

b

None of these

c

F e_{2} O_{4}

d

FeO

answer is A.

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Detailed Solution

The formula of Iron rust is

F e_{2} O_{3} . X H_{2} O

. It is named as Hydrated ferric oxide.

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Fe(iron)+O2(oxygen)+H2O(water)→rust . The formula of rust is