GK
GENERAL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following ores does not contain iron?
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Haematite
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Cassiterite
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Magnetite
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Limonite
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Explanation:
Detailed explanation-1: -Hematite and magnetite are by far the most common types of ore. Pure magnetite contains 72.4 percent iron, hematite 69.9 percent, limonite 59.8 percent, and siderite 48.2 percent, but, since these minerals never occur alone, the metal content of real ores is lower.
Detailed explanation-2: -Among all the given options, magnesite (MgCO3) is not a mineral of iron. It is the mineral of magnesium. Others are mineral of iron-Haematite (Fe2O3), magnetite (Fe3O4) and siderite (FeCO3).
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