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JEE Main levelSingle correct optionDifficulty 2 of 3mc132

11.2 g of iron and 4.8 g of sulphur are heated together to form FeS (). The maximum mass of FeS formed is (, )

  1. A
  2. B
  3. C
  4. D

Answer: D

Moles: Fe = 11.2/56 = 0.20; S = 4.8/32 = 0.15. The reaction is 1:1, so S is limiting. FeS = 0.15 x 88 = 13.2 g (M of FeS = 88).
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