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General Principles and processes of Isolation of Elements
easy
Which of the following are the by products not obtained in extraction of copper
A
Gold and silver are obtained as anode mud
B
$FeSiO_3$ obtained as slag is used in road making
C
$SO_2$, which is furthur used in manufacture of $H_2SO_4$ by contact process
D
$FeSO_4$ which is used to prepare green vitrol
Solution
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Standard 12
Chemistry
