JEE Mains · Chemistry · STD 12 - 3. Chemical kinetics
Iron (III) catalyses the reaction between iodide and persulphate ions, in which
A. \(Fe ^{3+}\) oxidises the iodide ion
B. \(Fe ^{3+}\) oxidises the persulphate ion
C. \(Fe ^{2+}\) reduces the iodide ion
D. \(Fe ^{2+}\) reduces the persulphate ion
Choose the most appropriate answer from the options given below:
- A B only
- B A only
- C B and C only
- D A and D only
Answer & Solution
Correct Answer
(D) A and D only
Step-by-step Solution
Detailed explanation
\(2 Fe ^{3+}+2 I ^{-} \rightarrow 2 Fe ^{2+}+ I _2\) \(2 Fe ^{2+}+ S _2 O _8^{2-} \rightarrow 2 Fe ^{3+}+2 SO _4^{2-}\) \(Fe ^{+3}\) oxidises \(I ^{-}\)to \(I _2\) and convert itself into \(Fe ^{+2}\). This \(Fe ^{+2}\) reduces \(S _2 O _8{ }^{2-}\) to \(SO _4{ }^{2-}\) and…
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