Chapter 10: Electrochemistry
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Q.1
The activity series of metals arranges metals in order of their:
Q.2
Which of the following metals would most readily displace hydrogen gas from dilute acids?
Electrochemical Cells
Q.3
The salt bridge allows transfer of in Zn-Cu voltaic cell.
Q.4
If In-Cu galvanic cell works ideotl complete discharge, compartments will have:
Q.5
Which of the following half-reaction represents a reduction process? + 2e → Zn*+ (aq)
Q.6
Which of the following half-reaction the oxidation represents process occurring in the disproportionation of Cu2+?
Q.7
If salt bridge is not used, between two half cells in a Galvanic cell, then the voltage:
Q.8
In an electrolysis experiment, if a charge of 96,500 Coulombs is passed through a solution, the amount of substance liberated or deposited at the electrode is directly related to:
Q.9
The experimental determination of number through Avogadro's typically involves electrolysis measuring:
Q.10 The principle of measuring • DO by Wrinkler's Method is based on:
Electrode Potential
Q.11
A positive value for the standard electrode potential (E°) of a metal ion/metal half-cell (e.g., Cu/Cu) indicates that:
Q.12
Which of the following changes would typically lead to an increase in the rate of electrolysis?
Q.13
Which of the following best defines oxidation?
Oxidation and Reduction
Q.14
What is the oxidation number of chlorine in NaCIOs?
Q.15 In the reaction: Fe → Fezt + 2e, iron is:
Q.16
Which of the following is an example of a disproportionation reaction?
Q.17
Which species is reduced in following reaction? Zn + Cu2+ → Zn?+ + Cu.
Q.18 Oxidation number of oxygen in H2O2 is:
Q.19 The oxidation number of sulfur in H2SO4 is:
Q.20 Redox reactions always involve:
Q.21 The reducing agent in a redox reaction:
Q.22
In redox reactions, oxidizing agents are:
Q.23
In a galvanic cell, the anode is: f
Q.24 Electrons in a galvanic cell flow from:
Q.25
Which component maintains electrical neutrality in an electrochemical cell?
Q.26 Standard hydrogen assigned a potential of:
Q.27 The cathode in an electrolytic cell is:
Q.28 The anode in electrolysis of molten NaCl is:
Q.29
In electrolysis, occurs at:
Q.30 A Daniell cell produces electricity through:
Q.31 A salt bridge is usually made from:
Q.32 Cell potential between:
Q.33
Standard electrode potential is measured under:
Q.34
A more negative E° value means the electrode:
Q.35
Which metal is the best reducing agent?
Q.36
Which element has E° = 0.00 V?
Q.37 A spontaneous redox reaction occurs if:
Q.38 The E cell of a cell is calculated as:
Q.39
Which of the following elements cannot displace hydrogen from acid?
Electrochemical Series
Q.40
Which metal lies below hydrogen in the electrochemical series?
Q.41
Which of the following will react with Hcl to liberate H2 gas?
Q.42 The more positive reduction potential:
Q.43 Electrolysis is the process of:
Q.44 Electrolysis requires:
Q.45
Faraday's First Law states that mass deposited is directly proportional to:
Q.46 One Faraday is equal to:
Q.47 Electrochemical equivalent is:
Q.48
If 1 Faraday of electricity is passed, the mass deposited equals:
Q.49 Electroplating involves:
Q.50
Electrolysis of CuSO using copper electrodes results in:
Q.51 Electrolyte in electroplating of silver
Q.51
The metal deposited at cathode during electrolysis of NaCl is:
Q.52 The number of coulombs required to deposit 1 mole of Ag+:
Q.53
The process of coating a metal with zinc is called:
Q.54
In electroplating, the object to be plated is connected to:
Q.55 Electrolysis is used in the extraction of:
Q.56
The process of purifying copper using electricity is called:
Q.58
Which of the following is not a use of electrochemistry?
Q.59 Electrolysis of brine produces:
Q.60 Downs cell is used for extraction of:
Q.61
In. the Hall-Héroult process, aluminum is obtained by:
Q.62
Electrochemical cells convert chemical energy into:
Q.63 If E°cell is +1.10 V, the reaction is:
Q.64
What is the unit of cell potential?
Q.65
Which metal will displace Cu from CuSO, solution?
Q.66
For a spontaneous, 4G should be:
Q.67
Which half-cell has the tendency to gain electrons?
Q.68
In an electrochemical cell, which ion migrates to cathode through the salt bridge?