When \[Fe{{S}_{2}}\] is burnt in air, it converts into \[F{{e}_{2}}{{O}_{3}}.\] The change in percentage by weight of iron in the process is (Fe = 56)

When \[Fe{{S}_{2}}\] is burnt in air, it converts into \[F{{e}_{2}}{{O

1.	When \[Fe{{S}_{2}}\] is burnt in air, it converts into \[F{{e}_{2}}{{O}_{3}}.\] The change in percentage by weight of iron in the process is (Fe = 56)
A.	23% increase
B.	12% decrease
C.	12% increase
D.	no change
Answer» B. 12% decrease

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When \[Fe{{S}_{2}}\] is burnt in air, it converts into \[F{{e}_{2}}{{O}_{3}}.\] The change in percentage by weight of iron in the process is (Fe = 56)

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