Chemistry XII - ElectroChemistry 05

Question : 1

(skipped)

In electrochemical cell, the function of salt bridge is

Options:

	To maintain electrical neutrality
	To allow the flow of current by completing the circuit
	To prevent the mechanical mixing of two solutions
	All of these

Solution :

(4)

All are the functions of salt bridge

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Question : 2

(skipped)

Which of the following types of electrolyte is suitable to take in salt bridge?
 

Options:

	Speed of cation > Speed of anion
	Speed of anion > Speed of cation
	Speed of cation ≃ Speed of anion
	Any electrolytes

Solution :

(3)

Charge of both compartment neutralize
simultaneously

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Question : 3

(skipped)

The cell representation is correct, if

Options:

	E°Cell = 1 only
	E°Cell < 0
	E°Cell > 0
	All of these

Solution :

(3)

E°_Cell > 0 then cell reaction is
spontaneous

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Question : 4

(skipped)

The correct statement for electrochemical cell is

Options:

	Flow of electrons from cathode to anode
	Flow of current from anode to cathode
	Flow of electrons from anode to cathode
	At equilibrium E°Cell = 0

Solution :

(3)

Electrons flows from anode to cathode.

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Question : 5

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If E°_O.P. = Standard oxidation potential

E°_R.P. = Standard reduction potential,

then the correct relation is

Options:

	E°Cell = E°R.P.(Anode) â€“ E°R.P.(Cathode)
	E°Cell = E°O.P.(Cathode) â€“ E°O.P.(Anode)
	E°Cell = E°O.P.(Anode)  â€“ E°R.P.(Cathode)
	E°Cell = E°O.P.(Anode)  + E°R.P.(Cathode)

Solution :

(4)

E°_Cell = E°_O.P.(Anode) + E°_{R.P.(Cathode)}

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Question : 6

(skipped)

E_Cell and E°_Cell are respectively

Options:

	Intensive property, intensive property
	Extensive property, extensive property
	Intensive property, extensive property
	Extensive property, intensive property

Solution :

(1)

E_Cell and E°_Cell both are intensive
property.

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Question : 7

(skipped)

If a third half cell reaction is obtained by adding two half cell reactions then standard electrode potential of third half cell is determined by
 

Options:

	Adding standard electrode potential of two half cells
	Subtracting standard electrode potential of two half cells
	Multiplying standard electrode potential of two half cells
	Adding ΔG° of two half cells

Solution :

(4)

Potential is added only if a cell reaction
is obtained by adding two half cell of reactions.

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Question : 8

(skipped)

Which of the following statement is correct?

Options:

	If E°Cell is negative then ΔG° is negative
	If E°Cell is positive then ΔG° is negative
	If E°Cell is positive then ΔG° is positive
	If E°Cell is zero then ΔG° is infinite

Solution :

(2)

ΔG° = –nFE°

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Question : 9

(skipped)

The correct statement about the electrode is

Options:

	Higher the oxidation potential, more the oxidizing power
	Higher the reduction potential, more the reducing power
	Lower the oxidation potential, higher the oxidizing power
	Lower the reduction potential, lesser the reducing power

Solution :

(3)

Lower the oxidation potential higher the
tendency to undergo reduction.

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Question : 10

(skipped)

The reduction potential of A₂, B₂, C₂ and D₂ are 0.53 V, 1.06 V, 2.85 V and 1.36 V respectively. The correct order of strength of oxidizing agent is

Options:

	C2 > D2 > B2 > A2
	B2 > C2 > A2 > D2
	A2 > B2 > C2 > D2
	D2 > A2 > B2 > C2

Solution :

(1)

More the reduction potential stronger the
oxidizing agent.