Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main 202523 JanuaryEvening Shift
Exam
JEE Main
Year
2025
Date
23 January
Shift
Evening Shift
Subject
Chemistry
Chapter
d and f Block Elements

JEE Main 2025 · 23 January · Evening Shift · Chemistry · d and f Block Elements

Consider the following reactions K_2 Cr_2 O_7 [-H_2 O] KOH [A]...

Consider the following reactions K2Cr2O7→−H2OKOH[A]→−H2OH2SO4[ B]+K2SO4\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7 \xrightarrow[-\mathrm{H}_2 \mathrm{O}]{\mathrm{KOH}}[\mathrm{A}] \xrightarrow[-\mathrm{H}_2 \mathrm{O}]{\mathrm{H}_2 \mathrm{SO}_4}[\mathrm{~B}]+\mathrm{K}_2 \mathrm{SO}_4 The products [A][A] and [B][B], respectively are :

Options

  1. AK2CrO4\mathrm{K}_2 \mathrm{CrO}_4 and CrO
  2. BK2CrO4\mathrm{K}_2 \mathrm{CrO}_4 and Cr2O3\mathrm{Cr}_2 \mathrm{O}_3
  3. CK2CrO4\mathrm{K}_2 \mathrm{CrO}_4 and K2Cr2O7\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7
  4. DK2Cr(OH)6\mathrm{K}_2 \mathrm{Cr}(\mathrm{OH})_6 and Cr2O3\mathrm{Cr}_2 \mathrm{O}_3

Correct answer

C. K2CrO4\mathrm{K}_2 \mathrm{CrO}_4 and K2Cr2O7\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7

Step-by-step solution

K2Cr2O7→−H2OKOHK2CrO4→−H2OH2SO4 K2Cr2O7+K2SO4\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7 \xrightarrow[-\mathrm{H}_2 \mathrm{O}]{\mathrm{KOH}} \mathrm{K}_2 \mathrm{CrO}_4 \xrightarrow[-\mathrm{H}_2 \mathrm{O}]{\mathrm{H}_2 \mathrm{SO}_4} \mathrm{~K}_2 \mathrm{Cr}_2 \mathrm{O}_7+\mathrm{K}_2 \mathrm{SO}_4 [A] K2CrO4\mathrm{K}_2 \mathrm{CrO}_4 [B] K2Cr2O7\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7
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