Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main202528 Jan 2025Morning ShiftChemistryd and f Block ElementsActual

Which of the following oxidation reactions are carried out by both K ₂ Cr ₂ O ₇ and KMnO ₄ in acidic medium? A. ⁻ I ₂ B. S²⁻ S C. Fe ²⁺ Fe ³⁺ D. ⁻ IO ₃ ⁻ E. S ₂ O ₃ ²⁻ 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 ⁻ OH IO ₃⁻ S ⁻² H ⁺ S S ₂ O ₃²⁻ OH SO ₄²⁻ aligned & Fe ⁺² Fe ⁺³ & ~S ₂ O ₃²⁻ H ⁺ S + SO ₄²⁻ 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⁺] , [ V ²⁺, Mn ²⁺] , [ Mn ²⁺, Fe ³⁺] and [ V ²⁺, Cr ²⁺] in which both ions are coloured is 3 . S 2026Given below are two statements for catalytic properties of transition metals. Statement I: First row transition metals which act as catalyst utilise their 3d electrons only for 2026The correct order of first ( _i H₁) and second ( _i H₂) ionisation enthalpy values of Cr and Mn are : A. _i H₁ : Cr > Mn B. _i H₂ : Cr > Mn C. _i H₁ : Mn > Cr D. _i H₂ : Mn > Cr Ch 2026The correct statements among the following are. A. Basic vanadium oxide is used in the manufacture of H ₂ SO ₄ . B. The spin-only magnetic moment value of the transition metal hali 2026Given below are two statements : Statement I: Presence of large number of unpaired electrons in transition metal atoms results in higher enthalpies of their atomisation. Statement 2026A paper dipped in a dil. H₂SO₄ solution of ' X ' upon treatment with SO₂ gas turns into green. The compound ' X ' is : 2026Which of the following is NOT a physical or chemical characteristics of interstitial compounds? 2026Pairs of elements with the same number of electrons in their respective 4f orbital are [Atomic number. Eu-63, Gd-64, Dy-66, Ho-67, Tm-69, Yb-70, Lu-71, Hf-72] A. (Eu and Gd) B. (Dy 2026 Full d and f Block Elements list All JEE Main PYQs