Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main 202528 JanuaryMorning Shift
Exam
JEE Main
Year
2025
Date
28 January
Shift
Morning Shift
Subject
Chemistry
Chapter
d and f Block Elements

JEE Main 2025 · 28 January · Morning Shift · Chemistry · d and f Block Elements

Which of the following oxidation reactions are carried out by both...

Which of the following oxidation reactions are carried out by both K2Cr2O7\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7 and KMnO4\mathrm{KMnO}_4 in acidic medium? A. Γ−→\Gamma^{-} \rightarrow\mathrm{I}2_2 B. S2−→SS^{2-} \rightarrow S C. Fe2+→Fe3+\mathrm{Fe}^{2+} \rightarrow \mathrm{Fe}^{3+} D. Γ−→IO3−\Gamma^{-} \rightarrow \mathrm{IO}_3{ }^{-} E. S2O32−→SO42−\mathrm{S}_2 \mathrm{O}_3{ }^{2-} \rightarrow \mathrm{SO}_4{ }^{2-} Choose the correct answer from the options given below:

Options

  1. AC, D and E Only
  2. BB, C and D Only
  3. CA, D and E Only
  4. DA, B and C Only

Correct answer

D. A, B and C Only

Step-by-step solution

I−→OHIO3−S−2→H+SS2O32−→OHSO42−\mathrm{I}^{-} \xrightarrow{\mathrm{OH}} \mathrm{IO}_3^{-} \mathrm{S}^{-2} \xrightarrow{\mathrm{H}^{+}} \mathrm{S} \mathrm{S}_2 \mathrm{O}_3^{2-} \xrightarrow{\mathrm{OH}} \mathrm{SO}_4^{2-}Fe+2⟶Fe+3 S2O32−→H+S↓+SO42−\begin{aligned} & \mathrm{Fe}^{+2} \longrightarrow \mathrm{Fe}^{+3} \\ & \mathrm{~S}_2 \mathrm{O}_3^{2-} \xrightarrow{\mathrm{H}^{+}} \mathrm{S} \downarrow+\mathrm{SO}_4^{2-} \end{aligned}$$
Practice d and f Block Elements on Quantrex Academy →

More from d and f Block Elements

Given below are two statements: Statement I: The number of pairs among [Ti^ 4+ , V^ 2+ ]… JEE Main 2026Given below are two statements for catalytic properties of transition metals. Statement… JEE Main 2026The correct order of first (Δ_i H_1) and second (Δ_i H_2) ionisation enthalpy values of… JEE Main 2026The correct statements among the following are. A. Basic vanadium oxide is used in the… JEE Main 2026Given below are two statements : Statement I: Presence of large number of unpaired… JEE Main 2026A paper dipped in a dil. H_2SO_4 solution of ' X ' upon treatment with SO_2 gas turns… JEE Main 2026Which of the following is NOT a physical or chemical characteristics of interstitial… JEE Main 2026Pairs of elements with the same number of electrons in their respective 4f orbital are… JEE Main 2026 Full d and f Block Elements list All JEE Main PYQs