1.

FeS_(2) is converted intoFe_(2)O_(3) according to the following equation4FeS_(2) +xO_(2) to 2Fe_(2)O_(3) + ySO_(2) x and y used in the equation have the values .

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10 and 8
11 and 8
5 and 4
6 and 7

Answer :B


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