The standard oxidation potentials of Cu/Cu2+and Cu+ /Cu2+ are  0.34V and  0.16 Vrespectively. The standard electrode potential of Cu+ /Cu would be :

1. 0.18V  

2. 0.52V

3. 0.82V    

4. 0.49V

Subtopic:  Relation between Emf, G, Kc & pH |
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Acidified water is electrolyzed using an inert electrode. The volume of gases liberated at

STP is 0.168L. The quantity of charge passed through the acidified water would be:

(1) 96,500 C 

(2) 9,650 C

(3) 965 C 

(4) 168 C

Subtopic:  Faraday’s Law of Electrolysis |
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 E0 for the reaction 
Fe + Zn2+ = Zn + Fe2+ is  0.35 V.
The   given   cell   reaction   is: 

1. Feasible  

2. Not feasible

3. In equilibrium 

4. None of the above

Subtopic:  Electrode & Electrode Potential |
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How much charge should be supplied to a cell for the electrolytic production of 245 gm NaClO4 from NaClO3 if the anode efficiency for the required reaction is 60%?

(1) 6.43 × 105C                                                

(2) 3.67 F

(3) 6.43 × 106 C                                               

(4) 5.67 F

Subtopic:  Faraday’s Law of Electrolysis |
 54%
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The specific conductivity of a solution depends upon :

1. Number of ions as well as mobility of ions.          

2. Number of ions per cc or (cm3) of solution.

3. Number of ions per cc or (cm3) as well as mobilities of ions.

4. Mobilities of ions.

Subtopic:  Conductance & Conductivity |
 63%
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The  number of electrons involved in the deposition of 63.5 g of Cu from a solution of CuSO4 is:

6.022 × 1023 

3.011 × 1023 

12.044 × 1023 

 6.022 × 1022

Subtopic:  Faraday’s Law of Electrolysis |
 68%
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Value of m0 for  SrCl2 (strong electrolyte) in water at 25 °C from the data below is:

Conc. (mol/litre)  0.25 1
Ω-cmmol-1 260 250

1. 270 Ω-1 cm2 mol-1                                                     

2. 260 Ω-1 cm2 mol-1 

3. 250 Ω-1 cm2 mol-1                                                    

4. 255 Ω-1 cm2 mol-1 

Subtopic:   Kohlrausch Law & Cell Constant |
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Calculate the energy obtainable from a lead storage battery in which 0.1 mol lead is consumed. Assume a constant concentration of 10.0 M H2 SO4 

(1) 42.8 kJ                                         

(2) 12.8 kJ

(3) 32.3 kJ                                         

(4) 20.2 kJ

Subtopic:  Faraday’s Law of Electrolysis |
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Adiponitrile is manufactured electrolytically from acrylonitrile CH2= CHCN  CN  (CH2 )4  CH

How many kg of adiponitrile (molecular mass = 108) is produced in 9.65 hr using a current of 3750 A with 80% efficiency?

(1) 30 kg                                               

(2) 58 kg

(3) 60 kg                                               

(4) 80 kg

Subtopic:  Faraday’s Law of Electrolysis |
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A certain metal salt solutions is electrolysed in series with a silver coulometer. The weights of silver and the metal deposited are 0.5094 g and 0.2653 g. Calculate the valency of the metal if its atomic weight is nearly that of silver. 

(1) 1                                                 

(2) 2

(3) 3                                                 

(4) 4

Subtopic:  Faraday’s Law of Electrolysis |
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