Chemical formula of rust is [BHU 1986; MP PET 1990]

1.	Chemical formula of rust is [BHU 1986; MP PET 1990]
A.	\[FeO\]
B.	\[F{{e}_{3}}{{O}_{4}}\]
C.	\[F{{e}_{2}}{{O}_{3}}.x{{H}_{2}}O\]
D.	\[FeO.\,x{{H}_{2}}O\]
Answer» D. \[FeO.\,x{{H}_{2}}O\]

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Chemical formula of rust is [BHU 1986; MP PET 1990]

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