Class-12,Electrochemistry

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Q1) Electrochemistry deals with the production of electricity from *

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nuclear energy and the use of electrical energy to bring about non-spontaneous chemical transformations

energy released during spontaneous chemical reactions and the use of heat energy to bring about non-spontaneous chemical transformations

energy released during spontaneous chemical reactions and the use of electrical energy to bring about non-spontaneous chemical transformations

nuclear energy and the use of heat energy to bring about non-spontaneous chemical

Q2) Galvanic or a voltaic cell converts the chemical energy liberated during a redox reaction to *

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electromagnetic energy

electrical energy

acoustic energy

thermal energy

Q3) Electrolytic cell uses electrical energy to bring about *

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non-spontaneous nuclear reactions

non-spontaneous chemical reactions

spontaneous nuclear reactions

spontaneous chemical reactions

Q4) Fundamental difference between an electrolytic cell and the galvanic cell is that in electrolytic cell *

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the free energy is supplied in the form of electrical work done on the system by the outside world

in electrolytic cell the free enenrgy is supplied in the form of mechanical work done by the system on the outside world

the free energy decreases as work is done by the system on the outside world

the free energy is supplied in the form of mechanical work done on the system by the outside world

Q5) Standard electrode potential is measured taking the concentrations of all the species involved in a half-cell is *

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4 M

1 M

Q6) Standard hydrogen electrode operated under standard conditions of 1 atm H2 pressure, 298K, and pH = 0 has a cell potential of *

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1.0 V

0.5 V

0.33 V

Q7) Difference between electronic and ionic (electrolytic) conductivity is that electronic conductance takes place in metals by movement of ________ and electrolytic conductance takes place in solutions by movement of ----- *

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electron cloud and electrolytes

ions and electrons

metals and ions

electrons and ions

Q8) Conductivity always decreases with decrease in concentration both, for weak and strong electrolytes because of the fact that *

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the number of ions per unit volume that carry the current in a solution decreases on dilution

mobility of ions that carry the current in a solution increases on dilution

the number of collisions of ions per unit volume that carry the current in a solution increases on dilution

the number of ions per unit volume that carry the current in a solution increases on dilution

Q9) Kohlrausch law of independent migration of ions states *

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that molar conductivity of an electrolyte can be represented as the sum of the individual contributions of the anion and cation of the electrolyte

that limiting molar conductivity of an electrolyte can be represented as the difference of the individual contributions of the anion and cation of the electrolyte

that limiting molar conductivity of an electrolyte can be represented as the sum of the individual contributions of the anion and cation of the electrolyte

limiting molar conductivity of anion and cation of the electrolyte with respect to nature of ions with which it is associated

Q10) According to Faraday’s First Law of Electrolysis 'the amount of chemical reaction which occurs at any electrode during electrolysis by a current is proportional to the *

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voltage of electricity passed through the electrolyte

amount of any substance obtained

quantity of electricity passed through the electrolyte

current passed through the electrolyte

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