The cell that will measure the standard electrode potential of a copper electrode is:

1. Pt(s) | H2(g, \(1 \over 10\) bar) | H+(aq, 1M) || Cu2+(aq, 1M) | Cu
2. Pt(s) | H2(g, 1 bar) | H+(aq, 1M) || Cu2+ (aq, 2M) | Cu
3. Pt(s) | H2(g, 1 bar) | H+(aq, 1M)|| Cu2+ (aq, 1M) | Cu
4. Pt(s) | H2(g, \(1 \over 10\) bar) | H+(aq, \(1 \over 10\)M) || Cu2+(aq, 1M) | Cu

Subtopic:  Electrolytic & Electrochemical Cell |
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An electrochemical cell can behave like an electrolytic cell when -

1. Ecell = 0

2. Ecell > Eext

3. Eext > Ecell

4. Ecell = Eext

Subtopic:  Electrolytic & Electrochemical Cell |
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In the electrolysis of concentrated aqueous sodium chloride solution, the half cell reaction that will occur at the anode is : 

1. Na+(aq) + e- ⟶ Na(s) ; \(E_{cell}^{o} \ = \ -2.71 \ V\)

2. 2H2O(l) ⟶ O2(g) + 4H+(aq) + 4e; \(E_{cell}^{o}\) = 1.23 V

3. H+(aq) + e-\(\frac{1}{2}\)H2(g) ; \(E_{cell}^{o}\) = 0.00 V

4. Cl-(aq) ⟶ \(\frac{1}{2}\)Cl2(g) + e- ; \(E_{cell}^{o}\) 1.36 V

Subtopic:  Electrolytic & Electrochemical Cell |
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The positive value of the standard electrode potential of Cu2+ / Cu indicates that-

a.  This redox couple is a stronger reducing agent than the H+ /H2 couple

b.  This redox couple is a stronger oxidising agent than H+ /H2

c.  Cu can displace H2 from acid.

d.  Cu cannot displace H2 from acid.


1. (a, b)
2. (b, c)
3. (c, d)
4. (b, d)

Subtopic:  Electrochemical Series | Electrolytic & Electrochemical Cell |
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ECell° of some half cell reactions are given below. 

I.  H+aq+e-12H2g ;    E°cell =0.00V

II.  2H2OlO2g+4H+aq+4e-;            Ecell =1.23V

III.  2SO42-aqS2O82-aq+2e-;           Ecell =1.96V

The correct choice among the given is -

a.  In dilute sulphuric acid solution, hydrogen will be reduced at cathode

b.  In concentrated sulphuric acid solution, water will be oxidised at anode

c.  In dilute sulphuric acid solution, water will be oxidised at anode

d.  In dilute sulphuric acid solution, SO42- ion will be oxidised to tetrathionate ion at anode

Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, c)

Subtopic:  Electrolytic & Electrochemical Cell |
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What will happen during the electrolysis of aqueous solution of CuSO4 in the presence of Cu electrodes?

a.  Copper will deposit at cathode

b.  Copperwill dissolve at anode

c.  Oxygen will be released at anode

d.  Copper will deposit at anode

The correct choice among the given is -


1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

Subtopic:  Electrolytic & Electrochemical Cell |
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For the given cell, Mg | Mg2+ || Cu2+ | Cu

a.  Mg acts as cathode

b.  Cu acts as cathode

c.  The cell reaction is Mg+ Cu2+ —-> Mg2+ + Cu

d.  Cu is the oxidising agent

The correct choice among the given is - 


1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

Subtopic:  Electrolytic & Electrochemical Cell | Nernst Equation |
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Assertion: Electrolysis of NaCl solution gives chlorine at anode instead of O2 .

Reason: Formation of oxygen at anode requires over voltage.

1.  Both assertion and reason are true and the reason is the correct explanation of assertion.

2.  Both assertion and reason are true and the reason is not the correct explanation of assertion.

3.  Assertion is true but the reason is false.

4.  Assertion is false but the reason is true.

 

Subtopic:  Electrolytic & Electrochemical Cell |
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Assertion: Current stops flowing when Ecell = 0.

Reason: Equilibrium of the cell reaction is attained.

1.  Both assertion and reason are true and the reason is the correct explanation of assertion.

2.  Both assertion and reason are true and the reason is not the correct explanation of assertion.

3.  Assertion is true but the reason is false.

4.  Both assertion and reason are false.

Subtopic:  Electrolytic & Electrochemical Cell |
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