A) \[F{{e}_{2}}{{O}_{3}}\cdot {{H}_{2}}O\]
B) \[F{{e}_{2}}{{O}_{3}}\cdot x{{H}_{2}}O\]
C) \[F{{e}_{2}}{{O}_{3}}\]
D) None of the above
Correct Answer: B
Solution :
The chemical formula of rust is\[F{{e}_{2}}{{O}_{3}}\cdot x{{H}_{2}}O\]
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