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. ferrooxidans; cobalt
(b) T.trioxidanes; molybdenum
(c) T. ferrooxidans; molybdenum
(d) T. trioxidanes; cobalt
The question was asked in an interview for internship.
My question is from Metal Recovery by Bioleaching Process in division Bioleaching and Biomining for Recovery of Resources of Environmental Biotechnology