Redox Reactions Question 1
Question 1 - 2024 (01 Feb Shift 1)
In acidic medium, $K _2 Cr _2 O _7$ shows oxidising action as represented in the half reaction
$Cr _2 O _7^{2-}+XH^{+}+Ye^{-} \rightarrow 2 A+ZH _2 O$
$X, Y, Z$ and $A$ are respectively are:
(1) $8,6,4$ and $Cr _2 O _3$
(2) $14,7,6$ and $Cr^{3+}$
(3) $8,4,6$ and $Cr _2 O _3$
(4) $14,6,7$ and $Cr^{3+}$
Show Answer
Answer (4)
Solution
The balanced reaction is,
$Cr _2 O _7^{2-}+14 H^{+}+6 e^{-} \rightarrow 2 Cr^{3+}+7 H _2 O$
$X=14$
$Y=6$
$A=7$
