How is scrap-iron separated from other wastes in a scrap yard?
A
Sublimation
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B
Magnetic separation
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C
Handpicking
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D
Winnowing
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Solution
The correct option is D Magnetic separation Waste materials supplied to
factories contain a number of scrap metals including iron ore. So, in
factories, scrap iron is separated from the heap of waste materials by using
big electromagnets fitted to a crane.