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15 questions
Electrochemistry deals with
electric energy
chemical energy
only a
both a & b
Electronic conduction is due to flow of
Protons
Electrons
Neutrons
Ions
Which of the following statement is false
flow of ions takes place in both direction
conductivity of electrolyte is generally low
electrolysis involves physical changes
flow of electrons is unidirectional
A chemical species in an electrochemical reaction that LOSSES electrons undergoes _________.
Oxidation Reaction
Reduction Reaction
A chemical species in an electrochemical reaction that GAINS electrons undergoes _________.
Oxidation Reaction
Reduction Reaction
In a galvanic cell, it is an electrode where the oxidation happens?
Cathode Electrode
Anode Electrode
How many electrons is needed to transform Fe2+ ion to solid state?
1
2
3
4
Is it possible for a cell potential to have NEGATIVE sign?
NO
YES
True or False, is a negative sign of delta G a favorable answer that indicates spontaneity?
TRUE
FALSE
In the reaction of Cu(s) + Ni2+(aq) ---> Ni (s) + Cu2+(aq), the ________ undergoes oxidation reaction.
Copper
Nickel
In the reaction of Cu(s) + Ni2+(aq) ---> Ni (s) + Cu2+(aq), the ________ undergoes reduction reaction.
Copper
Nickel
How many participating electrons in the redox reaction of MnO-4 +I- ---> MnO2 + I2? (Just the number)
How many participating electrons in the redox reaction of Fe2++Cr2O2-7 ---> Fe3++Cr3+? (Just the number)
In the cell notation;
one vertical line: denotes PHASE BOUNDARY
two vertical line: denotes _______________
(two words, ANSWER IN ALL CAPS)
One half-cell in a voltaic cell is constructed from a copper wire dipped into a 4.8 x 10 -3 M Solution of Cu(NO3)2. The other half-cell consist of zinc electrode in a 0.40 M Solution Zn(NO3)2. Calculate the Cell potential.
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Cu2+(aq) (4.8 x 10 -3 M) + 2e- ---> Cu(s), if [Eored=0.337 V]
Zn2+(aq) (0.40 M) + 2e- ---> Zn(s), if [Eored= - 0.763 V]
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Just the number value and the UNIT
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