Redox Reaction By Oxidation Number Method 01 Ques1
Question: Which of the following is the correct balanced equation for the reaction between $Ce{Cr_2O_7^{2-}}$ and $Ce{Fe^{2+}}$ in acidic medium?
Options:
A) $Ce{Cr_2O_7^{2-} + 6Fe^{2+} + 14H^+ \rightarrow 2Cr^{3+} + 6Fe^{3+} + 7H_2O}$
B) $Ce{Cr_2O_7^{2-} + 3Fe^{2+} + 14H^+ \rightarrow 2Cr^{3+} + 3Fe^{3+} + 7H_2O}$
C) $Ce{Cr_2O_7^{2-} + 6Fe^{2+} + 7H^+ \rightarrow 2Cr^{3+} + 6Fe^{3+} + 7OH^-}$
D) $Ce{2Cr_2O_7^{2-} + 6Fe^{2+} + 14H^+ \rightarrow 4Cr^{3+} + 6Fe^{3+} + 7H_2O}$
Show Answer
Answer: a
Explanation:
A) Correct. This equation is properly balanced for both atoms and charges.
B) Incorrect. The number of $Ce{Fe^{2+}}$ ions is incorrect.
C) Incorrect. The products include $Ce{OH^-}$ instead of $Ce{H_2O}$.
D) Incorrect. The amount of $Ce{Cr_2O_7^{2-}}$ is doubled unnecessarily.
BETA
