Which of the following is not an ore?

Bauxite

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Malachite

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Zinc blende

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Pig iron

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Solution

The correct option is D Pig iron
Pig iron: The iron obtained from Blast furnace
contains about 4% carbon and many impurities in smaller amount (e.g., S, P, Si, Mn). This is known as pig iron.
All others are ore.
$Malachite \to C u (O H)_{2} . C u C O_{3}$
$Zinc blends \to Z n S$
$Bauxite \to A l_{2} O_{3} .2 H_{2} O$

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