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Question
In the studies of Joffe and Sperll, it was observed that ________ is efficient for solubilizing Ni but the presence of ______ had adverse effect on leaching.
Options:
A .  T. ferrooxidans; cobalt
B .  T.trioxidanes; molybdenum
C .  T. ferrooxidans; molybdenum
D .  T. trioxidanes; cobalt
Answer: Option C
Answer: (c).T. ferrooxidans; molybdenum

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