Alpha Question Bank for Medical: Chemistry>Chapter 9 - Electrochemistry>Exercise 2>Q 20

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$Pt |\begin{array}{l} H_{2} & H^{+} \\ (p_{1}) & (1 M) \end{array} ‖ \begin{array}{l} H^{+} \\ (1 M) \end{array}| \begin{array}{l} H_{2} \\ (p_{2}) \end{array} Pt$ , (where $p_{1}$ and $p_{2}$ are pressures) cell reaction will be spontaneous if:

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Important Questions on Electrochemistry

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Alpha Question Bank for Medical: Chemistry>Chapter 9 - Electrochemistry>Exercise 2>Q 21

pH

of the solution in the anode compartment of the following cell at

25 ° C

is

x

when

E_{cell} - E_{cell} ° =

0.0591 V, Pt (H_{2}) ∣ pH = x ‖ {Ni}^{2 +} (1 M)] Ni, x

at

1 atm

is:

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Alpha Question Bank for Medical: Chemistry>Chapter 9 - Electrochemistry>Exercise 2>Q 22

The

EMF

of a concentration cell consisting of two zinc electrodes, one dipping into

\frac{M}{4}

solution of zinc sulphate & the other into

\frac{M}{16}

solution of the same salt at

25 ° C

is

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Alpha Question Bank for Medical: Chemistry>Chapter 9 - Electrochemistry>Exercise 2>Q 23

What is the potential of the cell containing two hydrogen electrodes as represented below

Pt / H_{2} (g) / H^{+} (10^{- 8}) M | | H^{+} (0.001 M) / \frac{1}{2} H_{2} (g) / Pt

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Alpha Question Bank for Medical: Chemistry>Chapter 9 - Electrochemistry>Exercise 2>Q 24

The two aqueous solutions,

A ({AgNO}_{3})

and

B (LiCl)

were electrolysed using

Pt

electrodes. The

pH

of the resulting solutions will:

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Alpha Question Bank for Medical: Chemistry>Chapter 9 - Electrochemistry>Exercise 2>Q 25

When current passed through electrolyte cation moved towards cathode and anion moved towards anode. If the cathode is pulled out of the solution

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Alpha Question Bank for Medical: Chemistry>Chapter 9 - Electrochemistry>Exercise 2>Q 26

A dilute solution of $H_{2} {SO}_{4}$ is electrolyzed. Select right statement with products at anode and cathode
respectively Given: $2 {SO}_{4}^{2 -} ⟶ S_{2} O_{8}^{2 -} + 2 e^{-}; E ° = - 2.01 V$

$H_{2} O (ℓ) ⟶ 2 H^{+} (aq) + 1 / 2 O_{2} (g) + 2 e^{-}; E ° = - 1.23 V$

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Alpha Question Bank for Medical: Chemistry>Chapter 9 - Electrochemistry>Exercise 2>Q 27

In an electrolytic cell of

Ag |{AgNO}_{3}| Ag

, when current is passed, the concentration of

{AgNO}_{3}

:

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Alpha Question Bank for Medical: Chemistry>Chapter 9 - Electrochemistry>Exercise 2>Q 28

Three faradays of electricity was passed through an aqueous solution of iron

(II)

bromide. The mass of iron metal (at. mass

56

) deposited at the cathode is -