Iron is NOT present in the form of sulphide in: \( \mathrm{P} \) (1) Fools gold (2) Siderite W (...

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Iron is NOT present in the form of sulphide in:
\( \mathrm{P} \)
(1) Fools gold
(2) Siderite
W
(3) Chalcopyrite
(4) Limonite
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