Describe how the following changes are brought about: (i) Pig iron into steel. (ii) Zinc oxide into metallic zinc. (i

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Q 2631778622.     Describe how the following changes are brought about:
(i) Pig iron into steel.
(ii) Zinc oxide into metallic zinc.
(iii) Impure titanium into pure titanium
CBSE-12th 2010

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