New chat PYQ Library Doubts Rank report

Sign in to see Recents

Sign in to save progress →

Electrochemistry question

2024 · 8 Apr · Shift 2 · Q14

Guest · try one question or challengeGuest · try one question or challenge

PYQ Library
JEE Main
Chemistry
Electrochemistry
2024 · 8 Apr · Shift 2 · Q14

Electrochemistry question

2024 · 8 Apr · Shift 2 · Q14

JEE MainChemistryElectrochemistryMCQ+4 / −1

Given below are two statements : Statement (I) : Fusion of

\mathrm{MnO}_2

with

\mathrm{KOH}

and an oxidising agent gives dark green

\mathrm{K}_2 \mathrm{MnO}_4

. Statement (II) : Manganate ion on electrolytic oxidation in alkaline medium gives permanganate ion. In the light of the above statements, choose the correct answer from the options given below :

A
Statement I is false but Statement II is true
B
Statement I is true but Statement II is false
C
Both Statement I and Statement II are false
D
Both Statement I and Statement II are true

More from Electrochemistry

The emf of cell $Tl (0.001 M) Tl^{+} (0.01 M) Cu^{2 +} ∣ Cu$ is $0.83 V$ at $298 K$ . It could be increased by :2024 · MCQ
The reaction; $\frac{1}{2} H_{2 (g)} + AgCl_{(s)} \to H_{(aq)}^{+} + Cl_{(aq)}^{-} + Ag_{(s)}$ occurs in which of the following galvanic cell :2024 · MCQ
The molar conductivity for electrolytes $A$ and $B$ are plotted against $C^{3/2}$ as shown below. Electrolytes $A$ and $B$ respectively are: Includes diagram2024 · MCQ
The standard reduction potentials at $298 K$ for the following half cells are given below : $Cr_{2} O_{7}^{2 -} + 14 H^{+} + 6 e^{-} \to 2 Cr^{3 +} + 7 H_{2} O, E^{\circ} = 1.33 V Fe^{3 +} (aq) + 3 e^{-} \to Fe Ni^{2 +} (aq) + 2 e^{-} \to Ni Ag^{+} (aq) + e^{-} \to Ag Au^{3 +} (aq) + 3 e^{-} \to Au E^{\circ} = - 0.04 V E^{\circ} = - 0.25 V E^{\circ} = 0.80 V E^{\circ} = 1.40 V$ …2024 · Numerical
Which out of the following is a correct equation to show change in molar conductivity with respect to concentration for a weak electrolyte, if the symbols carry their usual meaning :2024 · MCQ
Match List I with List II Choose the correct answer from the options given below : Includes table2024 · MCQ
The mass of silver (Molar mass of $Ag : 108 gmol^{- 1}$ ) displaced by a quantity of electricity which displaces $5600 mL$ of $O_{2}$ at S.T.P. will be g.2024 · Numerical
Which of the following statements is not correct about rusting of iron?2024 · MCQ