MCQs of Electrochemistry

Showing 1 to 10 out of 158 Questions
1.
Which reaction take place in electrochemical cell ?
 (a) Oxidation (b) Reduction (c) Redox (d) All the given
2.
Which cell differs from principle point of view?
 (a) Storage cell (b) Electrolytic cell (c) Fuel cell (d) Leclanche cell
3.
The electrochemical cell stops working after sometime. Why ?
 (a) Increase in temperature (b) The difference of cell potentials of both electrodes become zero. (c) By reversing the direction of reaction taking place in the cell. (d) Due to change in concentration
4.
What is used for the measurement of accurate potential of electrochemical cell ?
 (a) Galvanometer (b) Ammeter (c) Voltmeter (d) Potentiometer
5.
If M, N, O, P and Q are in the increasing order of their standard potentials in standard conditions of their standard half cells, then by combination of which two half cells maximum cell potential will be obtained ?
 (a) M and N (b) M and Q (c) M and P (d) M and O
6.
 (a) ${E}_{oxi}^{0}$ (b) $-{E}_{red}^{0}$ (c) $-{E}_{oxi}^{0}$ (d) ${E}_{redox}^{0}$
7.
The solution of silver nitrate become coloured when pieces of nickle are added to solution of silver nitrate because
 (a) Nickel is oxidised (b) Silver is oxidised (c) Nickel is reduced (d) Silver is precipitated
8.
The values of standard reduction potential of X, Y and Z metals are 0.34 V, 0.80 V and -0.45 V. Mention their order of strength as reducing agent
 (a) Z > Y > X (b) Z > X > Y (c) X > Y > Z (d) Y > Z > X
9.
The resistance of any uniform conductor is
 (a) in inverse proportion to its length (b) in direct proportion to its length (c) in the inverse proportion of the square of its area of cross section (d) in direct proportion of the area of its cross section
10.
Which is more corroded when the iron plates of steamers are connected with block of Zn metal and kept in contact of sea water ?
 (a) Iron (b) Zinc (c) Both (d) Neither of the metals
Showing 1 to 10 out of 158 Questions