KCET SERIES Chemistry
Electrochemical Cells
6 previous year questions.
Volume: 6 Ques
Yield: Medium
High-Yield Trend
3
2025 1
2023 1
2004 1
1998 Chapter Questions 6 MCQs
01
PYQ 1998
medium
chemistry ID: kcet-199
A device, in which electrical energy is converted into chemical energy, is called:
1
electrochemical cell
2
electrolytic cell
3
galvanic cell
4
fuel-cell
02
PYQ 2004
medium
chemistry ID: kcet-200
Aluminium displaces hydrogen from dilute HCl whereas silver does not. The E.M.F. of a cell prepared by combining and is The reduction potential of silver electrode is . The reduction potential of aluminium electrode is :
1
3.26 V
2
-1.66 V
3
+ 1.66 V
4
-3.26 V
03
PYQ 2023
hard
chemistry ID: kcet-202
Consider the following 4 electrodes
A : Ag+ (0.0001 M)/Ag(s) ; B : Ag+ (0.1 M) / Ag(s)
C : Ag+ (0.01 M)/Ag(s) ; D : Ag+ (0.001 M) / Ag(s); =+ 0.80 V
Then reduction potential in volts of the electrodes in the order
A : Ag+ (0.0001 M)/Ag(s) ; B : Ag+ (0.1 M) / Ag(s)
C : Ag+ (0.01 M)/Ag(s) ; D : Ag+ (0.001 M) / Ag(s); =+ 0.80 V
Then reduction potential in volts of the electrodes in the order
1
B > C > D > A
2
C > D > A > B
3
A > D > C > B
4
A > B > C > D
04
PYQ 2025
medium
chemistry ID: kcet-202
Match the following and select the correct option for the quantity of electricity, in Cmol , required to deposit various metals at the cathode.
1
, ii) 386000 Cmol
2
, iii) 289500 Cmol
3
, iv) 96500 Cmol
4
, i) 193000 Cmol
05
PYQ 2025
medium
chemistry ID: kcet-202
Catalysts are used to increase the rate of a chemical reaction. Because it
1
Decrease the activation energy of the reaction
2
Brings about improper orientation of reactant molecules
3
Increases the potential energy barrier
4
Increases the activation energy of the reaction
06
PYQ 2025
medium
chemistry ID: kcet-202
For a given half cell, on increasing the concentration of aluminium ion, the electrode potential will
1
No change
2
First increase then decrease
3
Increase
4
Decrease