1.

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.

A. T. <i>ferrooxidans</i>; cobalt
B. T.<i>trioxidanes</i>; molybdenum
C. T. <i>ferrooxidans</i>; molybdenum
D. T. trioxidanes; cobalt
Answer» D. T. trioxidanes; cobalt


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