COMEDK · Chemistry · 9. Redox Reactions
For decolourisation of 1 mole of \(\mathrm{KMnO}_{4}\), the moles of \(\mathrm{H}_{2} \mathrm{O}_{2}\) required is
- A \(\frac{1}{2}\)
- B \(\frac{3}{2}\)
- C \(\frac{5}{2}\)
- D \(\frac{7}{2}\)
Answer & Solution
Correct Answer
(C) \(\frac{5}{2}\)
Step-by-step Solution
Detailed explanation
The reaction for decolourisation of 1 mole of \(\mathrm{KMnO}_{4}\) by \(\mathrm{H}_{2} \mathrm{O}_{2}\) are given as follow: \[ 2 \mathrm{KMnO}_{4}+3 \mathrm{H}_{2} \mathrm{SO}_{4} \longrightarrow \mathrm{K}_{2} \mathrm{SO}_{4}+2 \mathrm{MnSO}_{4} \]…
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Chemistry
- Which of the following statement/s about nucleic acids is/are correct?
i. The chirality of both DNA and RNA molecules is due to the L-sugar component.
ii. The complementary bases in DNA are adenine \& thymine and guanine \& cytosine.
iii. \(\quad \beta\)-D-glucopyranose is the sugar moiety present in the RNA molecule.
iv. RNA controls the synthesis of proteins.COMEDK 2025 Medium - For the reaction \(\mathrm{P}+\mathrm{Q} \leftrightharpoons \mathrm{R}+\mathrm{S}\), carried out at 298 K , the equilibrium constant was found to be 169 and the initial concentrations of all reactants and products was 1.0 M . What is the equilibrium concentration of the reactants?COMEDK 2025 Medium
- Which of the following is highly basic?COMEDK 2022 Medium
- What wilt be the density of \(\mathrm{N}_2\) gas at \(230^{\circ} \mathrm{C}\) and \(3 \mathrm{~atm}\) pressure? \(\left(R=0.082 \mathrm{~L} \mathrm{~atm} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}\right)\)COMEDK 2022 Easy
- Which of the following does not conduct electricity?COMEDK 2018 Easy
- The mass number of an element \(\mathrm{X}\) is 175 with 104 neutrons in its nucleus. Into which one of the following orbitals will the last electron enter?COMEDK 2024 Medium
More PYQs from COMEDK
- Two similar circular loops carry equal currents in the same direction. On moving the coils further apart, the electric current willCOMEDK 2018 Easy
- Let \(a\) and \(b\) be non-zero real such that \(a \neq b\).
Then, the equation of the line passing through the origin and the point of intersection of \(\frac{x}{a}+\frac{y}{b}=1\) and \(\frac{x}{b}+\frac{y}{a}=1\) isCOMEDK 2015 Medium - \(\mathrm{Ti}^{2+}\) is purple while \(\mathrm{Ti}^{4+}\) is colourless becauseCOMEDK 2023 Medium
- Choose the correct statement applicable for the reaction: \(2 \mathrm{H}_{2} \mathrm{O}+2 \mathrm{~F}_{2} \rightarrow 4 \mathrm{HF}+\mathrm{O}_{2}\)COMEDK 2015 Medium
- The standard enthalpies of formation of CH\(_4\)(g), CO\(_2\)(g) and H\(_2\)O(l) are \(-74.8\) kJ mol\(^{-1}\), \(-393.5\) kJ mol\(^{-1}\) and \(-285.8\) kJ mol\(^{-1}\) respectively. Then the enthalpy change for the given reaction in kJ mol\(^{-1}\) will be:
\(2\text{CH}_4(g) + 4\text{O}_2(g) \rightarrow 2\text{CO}_2(g) + 4\text{H}_2\text{O}(l)\)COMEDK 2026 Medium - Which of the following species do not show disproportionation reaction?COMEDK 2014 Easy