The yellow colour of chromates changes to orange on acidification due to the formation of:
- A$Cr^{3+}$
- B$Cr_2O_3$
- C$Cr_2O_7^{2-}$
- D$CrO_4^-$
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Similar Questions
Which from the following is the general formula of the compound obtained when lanthanoid $(Ln)$ reacts with carbon at elevated temperature?
Which one of the following species does not represent a cationic species of vanadium formed in an aqueous solution?
$K_2Cr_2O_7 + H_2O_2 \xrightarrow{H^{+}} $
Medium
View Solution$X + KOH + O_2 \to Y + H_2O$,
$Y + H_2SO_4 \to Z + K_2SO_4 + MnO_2 + H_2O$
Identify $X, Y$ and $Z$ in the above reactions.
$Y + H_2SO_4 \to Z + K_2SO_4 + MnO_2 + H_2O$
Identify $X, Y$ and $Z$ in the above reactions.
Difficult
View SolutionGive the formulas of the oxocations of the $3d$ series metals.
Easy
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