Copper is dissolved from its ore by H‚Äö√á√áSO‚Äö√á√ë in a percolation tank made of$

Reinforced concrete lined with lead

Copper is dissolved from its ore by H‚Äö√á√áSO‚Äö√á�

1.	Copper is dissolved from its ore by H‚Äö√á√áSO‚Äö√á√ë in a percolation tank made of$
A.	Wood
B.	Stainless steel
C.	Reinforced concrete lined with lead
D.	High silicon iron (14% Si)
Answer» D. High silicon iron (14% Si)