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,...) MCQ Questions


1.
Electrochemical cells involve
A.
Only oxidation
B.
Only reduction
C.
Redox reactions
D.
No reaction
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ANSWER :
C. Redox reactions
2.
In a galvanic cell, electrons flow from
A.
Anode to cathode
B.
Cathode to anode
C.
Salt bridge to cathode
D.
Electrolyte to anode
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ANSWER :
A. Anode to cathode
3.
The function of salt bridge is to
A.
Maintain electrical neutrality
B.
Generate electrons
C.
Increase voltage
D.
Stop current flow
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ANSWER :
A. Maintain electrical neutrality
4.
Standard electrode potential is measured under
A.
Non-standard conditions
B.
Standard conditions
C.
High pressure
D.
Low temperature
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ANSWER :
B. Standard conditions
5.
Which of the following statements is correct for a Galvanic cell?

NEET - 2015

A.
It converts electrical energy into chemical energy
B.
It converts chemical energy into electrical energy
C.
It involves only physical changes
D.
It is a closed system
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ANSWER :
B. It converts chemical energy into electrical energy
6.
If EMF of a cell is negative, the reaction is
A.
Spontaneous
B.
Non-spontaneous
C.
At equilibrium
D.
None of these
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ANSWER :
B. Non-spontaneous