Electrochemical Cells (Electrolytic and Galvanic Cells, Different Types of Electrodes,...) NEET Questions

Physical Chemistry - Redox Reactions and Electrochemistry
Electrochemical Cells (Electrolytic and Galvanic Cells, Different Types of Electrodes,...)

Electrochemical Cells (Electrolytic and Galvanic Cells, Different Types of Electrodes,...) MCQ Questions


7.
The EMF of a galvanic cell with E°(cathode) = +0.80 V and E°(anode) = +0.34 V is:
A.
−1.14 V
B.
−0.46 V
C.
+0.46 V
D.
+1.14 V
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ANSWER :
C. +0.46 V
8.
Which of the following represents the correct cell notation for a Daniell cell?
A.
Zn(s) | Cu²⁺(aq) || Zn²⁺(aq) | Cu(s)
B.
Zn²⁺(aq) | Zn(s) || Cu(s) | Cu²⁺(aq)
C.
Cu(s) | Cu²⁺(aq) || Zn²⁺(aq) | Zn(s)
D.
Zn(s) | Zn²⁺(aq) || Cu²⁺(aq) | Cu(s)
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ANSWER :
D. Zn(s) | Zn²⁺(aq) || Cu²⁺(aq) | Cu(s)
9.
In the Daniell cell, the role of the salt bridge is to:
A.
Maintain electrical neutrality by allowing ion flow between the two half-cells
B.
Prevent any chemical reaction in the cell
C.
Increase the EMF of the cell
D.
Allow electrons to flow between the half-cells
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ANSWER :
A. Maintain electrical neutrality by allowing ion flow between the two half-cells
10.
If the standard reduction potential of Zn²⁺/Zn is −0.76 V and Cu²⁺/Cu is +0.34 V, the standard EMF of the Daniell cell (Zn | Zn²⁺ || Cu²⁺ | Cu) is:
A.
−0.42 V
B.
−1.10 V
C.
+0.42 V
D.
+1.10 V
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ANSWER :
D. +1.10 V
11.
Which one of the following statements about standard electrode potential is correct?
A.
A more negative reduction potential indicates a stronger oxidising agent
B.
A more negative reduction potential indicates a stronger reducing agent
C.
Standard electrode potential changes with temperature only above 1000 K
D.
Standard electrode potential depends on the amount of substance involved
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ANSWER :
B. A more negative reduction potential indicates a stronger reducing agent
12.
Which of the following metals will displace copper from a CuSO₄ solution?
A.
Zn (E° = −0.76 V)
B.
Pt (E° = +1.20 V)
C.
Ag (E° = +0.80 V)
D.
Au (E° = +1.50 V)
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ANSWER :
A. Zn (E° = −0.76 V)
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