Electrochemistry · Chemistry · WB JEE
MCQ (Single Correct Answer)
1
The molar conductances of $\mathrm{Ba}(\mathrm{OH})_2, \mathrm{BaCl}_2$ and $\mathrm{NH}_4 \mathrm{Cl}$ at infinite dilution are $523 \cdot 28,280 \cdot 0$ and $129.8 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$ respectively. The molar conductance of $\mathrm{NH}_4 \mathrm{OH}$ at infinite dilution will be
WB JEE 2025
2
$$\mathrm{BrF_3}$$ self ionises as following
WB JEE 2023
3
The equivalent conductance of NaCl, HCl and CH$$_3$$COONa at infinite dilution are 126.45, 426.16 and 91 ohm$$^{-1}$$cm$$^2$$eq$$^{-1}$$ respectively at 25$$^\circ$$C. The equivalent conductance of acetic acid (at infinite dilution) would be
WB JEE 2023
4
Which of the following solutions will have highest conductivity?
WB JEE 2021
5
The reduction potential of hydrogen half-cell will be negative if
WB JEE 2021
6
The charge carried by 1 millimole of Mn+ ions is 193 coulombs. The value of n is
WB JEE 2019
7
If electrolysis of aqueous CuSO4 solution is carried out using Cu-electrodes, the reaction taking place at the anode is
WB JEE 2019
8
What amount of electricity can deposit 1 mole of Al metal at cathode when passed through molten AlCl3 ?
WB JEE 2018
9
Given the standard half-cell potentials (E$$^\circ$$) of the following as
$$\matrix{ {Zn \to Z{n^{2 + }} + 2{e^ - };} & {{E^o} = + 0.76V} \cr {Fe \to F{e^{2 + }} + 2{e^ - };} & {{E^o} = 0.41V} \cr } $$
Then the standard e.m.f. of the cell with the reaction $$F{e^{2 + }} + Zn \to Z{n^{2 + }} + Fe$$ is
$$\matrix{ {Zn \to Z{n^{2 + }} + 2{e^ - };} & {{E^o} = + 0.76V} \cr {Fe \to F{e^{2 + }} + 2{e^ - };} & {{E^o} = 0.41V} \cr } $$
Then the standard e.m.f. of the cell with the reaction $$F{e^{2 + }} + Zn \to Z{n^{2 + }} + Fe$$ is
WB JEE 2018
10
How many faradays are required to reduce 1 mol of $$C{r_2}O_7^{2 - }$$ to Cr3+ in acid medium?
WB JEE 2017
11
The order of equivalent conductance at infinite dilution for LiCl, NaCl and KCl is
WB JEE 2016