Acidified \(KMnO_4\) oxidizes sulphite to:
Acidified \(KMnO_4\) oxidizes sulphite to:
Show Hint
\(SO_3^{2-} \)
\(SO_4^{2-} \)
\(SO_2(g) \)
\(S_2O_8^{2-} \)
The Correct Option is D
Solution and Explanation
Solution:
The reaction between acidified potassium permanganate (KMnO4) and sulphite (SO32-) occurs as an oxidation-reduction (redox) process. In this reaction, KMnO4 acts as an oxidizing agent, converting the sulphite ion to another form.
The oxidation state of sulphur in SO32- is +4. The goal of the oxidation process is to increase the oxidation state of sulphur. Acidified KMnO4 effectively oxidizes sulphite ions to peroxodisulfate ions (S2O82-). This involves the formation of a compound where two sulphur atoms are bonded via an oxygen-oxygen bond, and each sulphur atom is in the +6 oxidation state.
The balanced redox reaction is:
2KMnO4 + 5SO32- + 6H+ → 2Mn2+ + 5SO42- + 3H2O
Correct answer:
S2O82-
Top Questions on Redox Reactions
- State Faraday’s first law of electrolysis. How much electricity, in terms of Faraday, is required to reduce one mole of MnO4− to Mn2+ ion?
- CBSE CLASS XII - 2025
- Chemistry
- Redox Reactions
- The product of the oxidation of I$^-$ with MnO$_4^-$ in alkaline medium is:
- CBSE CLASS XII - 2025
- Chemistry
- Redox Reactions
- Complete and balance the following chemical equations:
(a) \(\text{MnO}_4^- + \text{C}_2\text{O}_4^{2-} + \text{H}^+ \to \) (b) \(\text{KMnO}_4 \xrightarrow{\text{Heat}} \) (c) \(\text{Cr}_2\text{O}_7^{2-} + \text{H}_2\text{S} + \text{H}^+ \to \)- CBSE CLASS XII - 2025
- Chemistry
- Redox Reactions
Convert Propanoic acid to Ethane
- CBSE CLASS XII - 2025
- Chemistry
- Redox Reactions
Which element is a strong reducing agent in +2 oxidation state and why?
- CBSE CLASS XII - 2025
- Chemistry
- Redox Reactions
Questions Asked in CBSE CLASS XII exam
- Two point charges of \( -5\,\mu C \) and \( 2\,\mu C \) are located in free space at \( (-4\,\text{cm}, 0) \) and \( (6\,\text{cm}, 0) \) respectively.
(a) Calculate the amount of work done to separate the two charges at infinite distance.
(b) If this system of charges was initially kept in an electric field \[ \vec{E} = \frac{A}{r^2}, \text{ where } A = 8 \times 10^4\, \text{N}\,\text{C}^{-1}\,\text{m}^2, \] calculate the electrostatic potential energy of the system.- CBSE CLASS XII - 2025
- Electrostatics
- 4,000 shares of ₹ 10 each were forfeited for non-payment of second and final call money of ₹ 2 per share. The minimum amount that the company must collect at the time of reissue of these shares will be :
- CBSE CLASS XII - 2025
- Accounting for Share Capital
- If $y = a \cos(\log x) + b \sin(\log x)$, then $x^2y'' + xy'1$ is:
- CBSE CLASS XII - 2025
- Continuity and differentiability
A ladder of fixed length \( h \) is to be placed along the wall such that it is free to move along the height of the wall.
Based upon the above information, answer the following questions:(iii) (b) If the foot of the ladder, whose length is 5 m, is being pulled towards the wall such that the rate of decrease of distance \( y \) is \( 2 \, \text{m/s} \), then at what rate is the height on the wall \( x \) increasing when the foot of the ladder is 3 m away from the wall?
- CBSE CLASS XII - 2025
- Application of derivatives
- A meeting will be held only if all three members A, B and C are present. The probability that member A does not turn up is 0.10, member B does not turn up is 0.20 and member C does not turn up is 0.05. The probability of the meeting being cancelled is:
- CBSE CLASS XII - 2025
- Probability