Question

Acidified potassium dichromate on reacting with a sulphite is reduced to.

• A. $CrO_{2}Cl_{2}$
• B. $CrO_{4}^{2 -}$
• C. $Cr^{3 +}$
• D. $Cr^{2 +}$

Answer 1

Answer: (C)

$Cr^{3 +}$

Answer 2

$Cr_{2}O_{7}^{2 -} + 8H^{+} + 2SO_{3}^{2 -} \rightarrow 2Cr^{+ 3} + 3SO_{4}^{2 -} + 4H_{2}O$