During the electrolysis of molten sodium chloride, the time required to produce 0.10 mol of chlorine gas using a current of 3 amperes is:

1. 55 minutes

2. 110 minutes

3. 220 minutes

4. 330 minutes

Subtopic:  Faraday’s Law of Electrolysis |
 56%
From NCERT
NEET - 2016
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In the electrochemical cell: 
  Zn | ZnSO4 (0.01 M) || CuSO4(1.0 M) | Cu, the emf of this Daniel cell is E1. When the concentration of ZnSO4 is changed to 1.0 M and that of CuSO4 is changed to 0.01 M, the emf changes to E2. From the following, which one is the relationship between E1 and E2
(Given, \(\frac{RT}{F}\) = 0.059)

1. E1<E2

2. E1>E2

3. E2=0E1

4. E1=E2

Subtopic:  Electrode & Electrode Potential | Nernst Equation |
 68%
From NCERT
NEET - 2017
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If the Eocell for a given reaction has a negative value, which of the following gives correct relationships for the values of  ∆Go and Keq?

1. Go > 0; Keq< 1

2. Go > 0; Keq> 1

3. Go < 0; Keq> 1

4. Go < 0; Keq< 1

Subtopic:  Relation between Emf, G, Kc & pH |
 70%
From NCERT
NEET - 2016
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The number of electrons delivered at the cathode during electrolysis by a current of 1 ampere in 60 seconds is:

(Charge on electron = 1.60 × 10–19 C)

1.  6×1023

2.  6×1020

3.  3.75×1020

4.  7.48×1020

Subtopic:  Faraday’s Law of Electrolysis |
 78%
From NCERT
NEET - 2016
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Consider the change in oxidation state of Bromine corresponding to different emf values as shown in the diagram below: 
 
Then the species undergoing disproportionation is:-

1. \(\text{BrO}^-_3\) 2. \(\text{BrO}^-_4\)
3. \(\text{Br}_2\) 4. \(\text{HBrO}\)

Subtopic:  Electrode & Electrode Potential |
 60%
From NCERT
NEET - 2018
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The pressure of H2 required to make the potential of H- electrode zero in pure water at 298 K is:

1. 10-12  atm 2. 10-10  atm
3. 10-4  atm 4. 10-14 atm
Subtopic:  Nernst Equation |
 66%
From NCERT
NEET - 2016
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A device that converts the energy of combustion of fuels, like hydrogen and methane, directly into electrical energy is known as: 

1. Fuel cell. 2. Electrolytic cell.
3. Dynamo. 4. Ni-Cd cell.
Subtopic:  Batteries & Salt Bridge |
 83%
From NCERT
NEET - 2015
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When 0.1 mol MnO42- is oxidized the quantity of electricity required to completely oxidise MnO42--  to MnO4- is: 

1. 96500 C

2. 2 x 96500 C

3. 9650 C

4. 96.50 C

Subtopic:  Faraday’s Law of Electrolysis |
 77%
From NCERT
AIPMT - 2014
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The weight of silver (at.wt. = 108) displaced by a quantity of electricity which displaces 5600 mL of Oat STP will be:

1. 5.4 g

2. 10.8 g

3. 54.0 g

4. 108.0 g

Subtopic:  Faraday’s Law of Electrolysis |
 55%
From NCERT
AIPMT - 2014
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A hydrogen gas electrode is made by dipping platinum wire in a solution of HCl of pH = 10 and by passing hydrogen gas around the platinum wire at one atm pressure. The oxidation potential of the electrode would be: 

1. 0.59 V 2. 0.118 V
3. 1.18 V 4. 0.059 V
Subtopic:  Relation between Emf, G, Kc & pH |
 74%
From NCERT
AIPMT - 2013
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