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WorksheetsElectrochemistry
Total questions: 10
Worksheet time: 8mins
Standard solution of KNO3 is used to make a salt bridge because
Velocity of K+ is greater than that of NO-3
Velocity of NO-3 is greater than that of K+.
Velocity of both K+and NO-3 are nearly same
KNO3 is highly soluble in water.
Which of the following assertions about the main cell is correct?
An example of a primary cell is a mercury cell
An example of a primary cell is a nickel-cadmium storage cell
The electrode reactions can be reversed
It can be recharged
a
b
c
d
Galvanised iron sheets are coated with
Carbon
Copper
Zinc
Nickel
The standard reduction potentials of X, Y, Z metals are 0.52, -3.03, -1.18 respectively. The order of reducing power of the corresponding metals is
Y>Z>X
X>Y>Z
Z>Y>X
Z>X>Y
Effect of dilution on conductivity of solution
Increases
Decreases
Unchanged
None of the above
In which of the following conditions salt bridge is not required in a galvanic cell?
When galvanic cell is used in geyser.
When distance between oxidation half cell and reduction half cell is negligible.
Electrolytic solutions used in both the half cells are of same concentration.
When both the electrodes are dipped in the same electrolytic solution.
Faraday's laws of electrolysis will fail
when
temperature is increased
inert electrodes are used
a mixture of electrolytes is used
None of these cases
Which of the following is given to a fuel cell’s cathode?
Hydrogen
Nitrogen
Oxygen
Chlorine
The conductivity of electrolytic conductors is due to
Flow of free mobile electrons
Movement of ions
Either movement of electrons or ions
Cannot be said
