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Q. No.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 |
An electrochemical cell can behave like an electrolytic cell when -
1. Ecell = 0
2. Ecell > Eext
3. Eext > Ecell
4. Ecell = Eext
The half-cell reaction at the anode during the electrolysis of aqueous sodium chloride solution is represented by :
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- ; \(E_{cell}^{o}\)
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)
of some half cell reactions are given below.
I.
II.
III.
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)
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)
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)
Given below are two statements:
| Assertion (A): | Electrolysis of NaCl solution gives chlorine at anode instead of O2 . |
| Reason (R): | Formation of oxygen at anode requires overvoltage. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
Given below are two statements:
| Assertion (A): | Current stops flowing when Ecell = 0. |
| Reason (R): | Equilibrium of the cell reaction is attained. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
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Q. No.
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