Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main202528 Jan 2025Morning ShiftChemistryRedox ReactionsActual

Given below are two statements: Statement I: In the oxalic acid vs KMnO ₄ (in the presence of dil H ₂ SO ₄ ) titration the solution needs to be heated initially to 60^ C , but no heating is required in Ferrous ammonium sulphate (FAS) vs KMnO ₄ titration (in the presence of dil H ₂ SO ₄ ) Statement II: In oxalic acid vs KMnO ₄ titration, the initial formation of MnSO ₄ takes place at high temperature, which then acts

Options

  1. ABoth Statement I and Statement II are false
  2. BBoth Statement I and Statement II are true
  3. CStatement I is false but Statement II is true
  4. DStatement I is true but Statement II is false

Correct answer

B. Both Statement I and Statement II are true

Step-by-step solution

Heating is required in oxalic acid filtration due to High activation energy. Heating is not required in FAS vs KMnO ₄ titration because Fe ²⁺ will get converted into Fe ³⁺ by oxygen of air and error may be introduced in the experiment. Both Statement-I and Statement-II are correct.

Practice Redox Reactions on Quantrex Academy →

More from Redox Reactions

500 mL of 0.2 M MnO₄^- solution in basic medium when mixed with 500 mL of 1.5 M KI solution, oxidises iodide ions to liberate molecular iodine. This liberated iodine is then titrat 2026Given below are two statements: Statement I: Sodium dichromate and potassium dichromate are classified as primary standards in titrimetric analysis. Statement II: Phenolphthalein i 2026In order to oxidise a mixture of 1 mole each of FeC₂O₄ , Fe₂(C₂O₄)₃ , FeSO₄ and Fe₂(SO₄)₃ in acidic medium, the number of moles of KMnO₄ required is 2026500 mL of 1.2 M KI solution is mixed with 500 mL of 0.2 M KMnO ₄ solution in basic medium. The liberated iodine was titrated with standard 0.1 M Na ₂ ~S ₂ O ₃ solution in the prese 2026One mole of Cl ₂( ~g ) was passed into 2 L of cold 2 M KOH solution. After the reaction, the concentrations of Cl ⁻, ClO ⁻ and OH ⁻ are respectively (assume volume remains constant 2026X and Y are the number of electrons involved, respectively during the oxidation of I ⁻ to I ₂ and S ²⁻ to S by acidified K ₂ Cr ₂ O ₇ . The value of X + Y is _ _ _ _ . 2026200 cc of x 10⁻³ M potassium dichromate is required to oxidise 750 cc of 0.6 M Mohr's salt solution in acidic medium. Here x= _ _ _ _ . 2026Identify the correct statements : A. Hydrated salts can be used as primary standard. B. Primary standard should not undergo any reaction with air. C. Reactions of primary standard 2026 Full Redox Reactions list All JEE Main PYQs