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AP Police SI Exam Prelims 2016 Paper 2 (General Studies)

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Question : 9 of 100

Marks: +1, -0

Identify the correct statements from the following
I) Sulphide ores are purified by froth-floatation process
II) Smelting is generally done in Blast furnace
III) Zone refining method is for refining iron
IV) Aluminium is extracted from pyrolusite

I & II
II & III
III & IV
II & IV

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