Which compound is formed when $H_2S$ gas is passed through an acidic solution of $KMnO_4$?
- A$K_2S$
- B$S$
- C$K_2SO_3$
- D$MnO_2$
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$x BrO_3^- + y Cr^{3+} + z H_2O \to Br_2 + CrO_4^{2-} + H^{+}$
the coefficients $x, y, z$ are
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