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Passage of one ampere current through $0.1 M Ni {({NO}_{3})}_{2}$ solution using $Ni$ electrodes brings in the concentration of solution to $\dots \dots \dots$ in $60$ seconds. (Assume that there is a large amount of water in the electrolytic solution)

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Important Questions on Electrochemistry

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MHT-CET

IMPORTANT

Practice Book for MHT-CET Chemistry (Physical Chemistry 2)>Chapter 3 - Electrochemistry>TOPICWISE QUESTIONS>Q 57

0.5

Faraday of electricity was passed to deposit all the copper present in

500 ml

{CuSO}_{4}

solution. What is the molarity of this solution?

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Practice Book for MHT-CET Chemistry (Physical Chemistry 2)>Chapter 3 - Electrochemistry>TOPICWISE QUESTIONS>Q 58

The passage of three faradays of charge through an aqueous solution of

{AgNO}_{3}, {CuSO}_{4}, Al {({NO}_{3})}_{3}

and

NaCl

will deposit metals at the cathode in the molar ratio of

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Practice Book for MHT-CET Chemistry (Physical Chemistry 2)>Chapter 3 - Electrochemistry>TOPICWISE QUESTIONS>Q 59

The weight of silver (equivalent weight

= 108

) displaced by the quantity of current, which displaced

5600 mL

of hydrogen at STP is:

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MHT-CET

IMPORTANT

Practice Book for MHT-CET Chemistry (Physical Chemistry 2)>Chapter 3 - Electrochemistry>TOPICWISE QUESTIONS>Q 60

A current is passed through two voltmeters connected in series. The first voltmeter contains

{XSO}_{4}

(aq) while the second voltmeter contains

Y_{2} {SO}_{4}

(aq). The relative atomic masses of

X

and

Y

are in the ratio of

2 : 1

. The ratio of the mass of

X

liberated to the mass of

Y

liberated is:

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Practice Book for MHT-CET Chemistry (Physical Chemistry 2)>Chapter 3 - Electrochemistry>TOPICWISE QUESTIONS>Q 61

Calculate the volume of hydrogen at NTP, obtained by passing a current of

0.4

ampere through acidified water for

30

minutes.

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Practice Book for MHT-CET Chemistry (Physical Chemistry 2)>Chapter 3 - Electrochemistry>TOPICWISE QUESTIONS>Q 62

Aluminium oxide may be electrolyzed at $1000 ° C$ to furnish aluminium metal.

(Atomic mass $= 27 amu$ . $1$ Faraday $= 96500 C$ ) The cathode reaction is: ${Al}^{3 +} + 3 e^{-} ⟶ Al .$

To prepare $5.12 kg$ of aluminium metal by this method would require:

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Practice Book for MHT-CET Chemistry (Physical Chemistry 2)>Chapter 3 - Electrochemistry>TOPICWISE QUESTIONS>Q 63

Electrolysis is carried out in three cells:

(1) 1.0 M {CuSO}_{4}

Pt

electrodes;

(2) 1.0 M {CuSO}_{4},

Copper electrodes;

(3)

1.0 M KCl,

Pt

electrodes. If the volume of the electrolytic solution is maintained constant in each of the cells, which is the correct set of

pH

changes in

(1), (2)

and

(3)

cells respectively?

HARD

MHT-CET

IMPORTANT

Practice Book for MHT-CET Chemistry (Physical Chemistry 2)>Chapter 3 - Electrochemistry>TOPICWISE QUESTIONS>Q 64

The

pH

0.5 L

1.0 M NaCl

after the electrolysis for

965 s

using

5.0 A

current (

100 %

efficiency) is _______.

Passage of one ampere current through 0.1 M NiNO32 solution using Ni electrodes brings in the concentration of solution to ……… in 60 seconds. (Assume that there is a large amount of water in the electrolytic solution)

Important Questions on Electrochemistry

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Passage of one ampere current through $0.1 M Ni {({NO}_{3})}_{2}$ solution using $Ni$ electrodes brings in the concentration of solution to $\dots \dots \dots$ in $60$ seconds. (Assume that there is a large amount of water in the electrolytic solution)