1.

(A) For iron extraction usually Fe_(2) O_(3)is used but not FeS_(2) (R) Fe_(2) O_(3)does not produce polluting gas like SO_(2)but FeS_(2)

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Both (A) and (R) are TRUE and (R) is the CORRECT explanation of (A)
Both (A) and (R) are true and (R) is not the correct EXPLANATIONOF (A)
(A) is true but (R) is FALSE
Both (A) and (R) are false

Answer :A


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