During the reaction of permanganate with thiosulphate, the change in oxidation of manganese occurs by value of 3.…
Redox Reactions · Class 11 · JEE Main Previous Year Question
During the reaction of permanganate with thiosulphate, the change in oxidation of manganese occurs by value of 3. Identify which of the below medium will favour the reaction.
- a
Both aqueous acidic and neutral
- b✓
Aqueous neutral
- c
Both aqueous acidic and faintly alkaline
- d
Aqueous acidic
Aqueous neutral
Step 1 — Oxidation state changes of Mn in different media:
| Medium | Reaction | Mn change | |---|---|---| | Acidic | | (change = 5) | | Neutral | | (change = 3) | | Alkaline | | (change = 1) |
Step 2 — Identify medium with change = 3:
In neutral (aqueous neutral) medium, Mn changes from to (a change of 3).
The reaction in neutral medium:
Answer: Option (2) — Aqueous neutral
Practice this question with progress tracking
Want timed practice with adaptive difficulty? Solve this question (and hundreds more from Redox Reactions) inside The Crucible, our adaptive practice platform.
More JEE Main Redox Reactions PYQs
0.1 M solution of KI reacts with excess of H2SO4 and KIO3 solution. According to equation 5I- + IO3- + 6H+ - 3I2 + 3H2O Identify the correct statements: (A) 200 mL of KI solution reacts with 0.004…
Identify the incorrect statements regarding primary standard of titrimetric analysis. (A) It should be purely available in dry form. (B) It should not undergo chemical change in air. (C) It should be…
KMnO4 decomposes on heating at 513 K to form O2 along with
Given below are two statements: Statement (I): Potassium hydrogen phthalate is a primary standard for standardisation of sodium hydroxide solution. Statement (II): In this titration phenolphthalein…
Given below are two statements: Statement I: In redox titration, the indicators used are sensitive to change in pH of the solution. Statement II: In acid-base titration, the indicators used are…