JEE Mains · Chemistry · STD 11 - 7. Redox reactions
\(2 \mathrm{MnO}_4^{-}+\mathrm{bI}^{-}+\mathrm{cH}_2 \mathrm{O} \rightarrow \mathrm{xI}_2+\mathrm{yMnO}_2+\mathrm{zOH}^{-}\) If the above equation is balanced with integer coefficients, the value of \(z\) is _______.
- A \(8\)
- B \(7\)
- C \(6\)
- D \(9\)
Answer & Solution
Correct Answer
(A) \(8\)
Step-by-step Solution
Detailed explanation
Reduction Half Oxidation Half \(2 \mathrm{MnO}_4^{-} \rightarrow 2 \mathrm{MnO}_2\) \(2 \mathrm{I}^{-} \rightarrow \mathrm{I}_2+2 \mathrm{e}^{-}\) \(2 \mathrm{MnO}_4^{-}+4 \mathrm{H}_2 \mathrm{O}+6 \mathrm{e}^{-} \rightarrow 2 \mathrm{MnO}_2+8 \mathrm{OH}^{-}\)…
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
- For the reaction \(2 \mathrm{H}_{2}(\mathrm{g})+2 \mathrm{NO}(\mathrm{g}) \rightarrow \mathrm{N}_{2}(\mathrm{g})+2 \mathrm{H}_{2} \mathrm{O}(\mathrm{g})\) the observed rate expression is, rate \(=\mathrm{k}_{\mathrm{f}}[\mathrm{NO}]^{2}\left[\mathrm{H}_{2}\right] .\) The rate expression of the reverse reaction isJEE Mains 2020 Medium
- Number of spectral lines obtained in \(\mathrm{He}^{+}\)spectra, when an electron makes transition from fifth excited state to first excited state will be _______.JEE Mains 2024 Hard
- The number of units, which are used to express concentration of solutions from the following is _________.(Mass percent, Mole, Mole fraction, Molarity, ppm, Molality.)JEE Mains 2023 Medium
- The wave function \((\Psi)\) of \(2 s\) is given by \(\Psi_{2 s}=\frac{1}{2 \sqrt{2 \pi}}\left(\frac{1}{a_0}\right)^{1 / 2}\left(2-\frac{ r }{ a _0}\right) e ^{- r / 2 a _0}\) At \(r=r_0\), radial node is formed. Thus, \(r_0\) in terms of \(a_0\)JEE Mains 2023 Medium
- The de Broglie wavelength of an electron in the \(4^{th}\) Bohr orbit isJEE Mains 2020 Hard
- Match List \(I\) with List \(II\)
Choose the correct answer from the options given below:List \(I\) List \(II\) \(A\) \(\alpha\)-Glucose and \(\alpha\)-Galactose \(I\) Functional isomers \(B\) \(\alpha\)-Glucose and \(\beta\)-Glucose \(II\) Homologous \(C\) \(\alpha\)-Glucose and \(\alpha\)-Fructose \(III\) Anomers \(D\) \(\alpha\)-Glucose and \(\alpha\)-Ribose \(IV\) Epimers JEE Mains 2024 Medium
More PYQs from JEE Mains
- \(298 \mathrm{~K}\) It could be increased by _______.
JEE Mains 2024 Medium - Two different adiabatic paths for the same gas intersect two isothermal curves as shown in\(P-V\) diagram. The relation between the ratio \(\frac{V_a}{V_d}\) and the ratio \(\frac{V_b}{V_c}\) is _______.
JEE Mains 2024 Hard - Glycosidic linkage between \(C _{1}\) of \(\alpha\)-glucose and \(C _{2}\) of \(\beta\)-fructose is found in.JEE Mains 2022 Medium
- At which temperature the r.m.s. velocity of a hydrogen molecule equal to that of an oxygen molecule at \(47^{\circ} \mathrm{C}\) ?JEE Mains 2024 Hard
- The metal \(d-\) orbital that can directly facing the ligands in \(K_3[Co(CN)_6]\) areJEE Mains 2019 Hard
- Given below are two statements, one is labelled as Assertion \(A\) and the other is labelled as Reason \(R\). Assertion \(A\) : \(\left[ CoCl \left( NH _3\right)_5\right]^{2+}\) absorbs at lower wavelength of light with respect to \(\left[ Co \left( NH _3\right)_5\left( H _2 O \right)\right]^{3+}\) Reason \(R\) : It is because the wavelength of the light absorbed depends on the oxidation state of the metal ion. In the light of the above statements, choose the correct answer from the options given below :JEE Mains 2023 Medium