MCQ
Acidified $KMn{O_4}$ is decolourzed by
- ✓$B{r_2}$
- B${O_3}$
- C$HCl$
- D$HBr$
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[Given : $h =6.63 \times 10^{-34}\, J \,s$, and $c =3 \times 10^{8} \,m\, s ^{-1}$ ]


