WB JEE 2019 | Electrochemistry Question 7 | Chemistry

WB JEE 2019

MCQ (Single Correct Answer)

-0.33

If electrolysis of aqueous CuSO₄ solution is carried out using Cu-electrodes, the reaction taking place at the anode is

H⁺ + e^$$-$$ $$\to$$ H

Cu²⁺ (aq) + 2e^$$-$$ $$\to$$ Cu (s)

SO$$_4^{2 - }$$ (aq) $$-$$ 2e^$$-$$ $$\to$$ SO₄

Cu(s) $$-$$ 2e^$$-$$ $$\to$$ Cu²⁺ (aq)

WB JEE 2018

MCQ (Single Correct Answer)

-0.33

What amount of electricity can deposit 1 mole of Al metal at cathode when passed through molten AlCl₃ ?

0.3F

1/3F

WB JEE 2018

MCQ (Single Correct Answer)

-0.33

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

$$-$$0.35 V

+ 0.35 V

+ 1.17 V

$$-$$1.17 V

WB JEE 2017

MCQ (Single Correct Answer)

-0.25

How many faradays are required to reduce 1 mol of $$C{r_2}O_7^{2 - }$$ to Cr³⁺ in acid medium?

WB JEE Subjects