question_answer

\[X+4{{H}_{2}}O\xrightarrow{{}}Y+Z\] \[X+S\xrightarrow{{}}R\] 'Y? is the magnetic oxide of iron and 'R? is a grey sulphide.

A)

X	Y	Z	K
\[Fe\]	\[F{{e}_{2}}{{O}_{3}}\]	\[{{H}_{2}}\]	\[FeS\]

B)

X	Y	Z	K
\[Fe\]	\[F{{e}_{2}}{{O}_{4}}\]	\[{{H}_{2}}\]	\[FeS\]

C)

X	Y	Z	K
\[Fe\]	\[F{{e}_{3}}{{O}_{3}}\]	\[{{O}_{2}}\]	\[FeS\]

D)

X	Y	Z	K
\[Fe\]	\[F{{e}_{2}}{{O}_{3}}\]	\[{{O}_{2}}\]	\[FeS\]