MCQ
Froth flotation is a process of $.......$
- AOxidation.
- BReduction.
- CRefining.
- ✓Concentration.
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$Toluene\,\, \xrightarrow[{2.\,{H^ + }}]{{1.\,KMn{O_4}/O{H^ - }}}I\xrightarrow{{SOC{l_2}}}II\xrightarrow{{N{H_3}}}III\xrightarrow{{OB{r^ - }}}IV$ is