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कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

Which of the following statement is correct? - Chemistry

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प्रश्न

Which of the following statement is correct?

पर्याय

  • ECell and ∆rG of cell reaction both are extensive properties.

  • ECell and ∆rG of cell reaction both are intensive properties.

  • ECell is an intensive property while ∆rG of cell reaction is an extensive property.

  • ECell is an extensive property while ∆rG of cell reaction is an intensive property.

MCQ
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उत्तर

ECell is an intensive property while ∆rG of cell reaction is an extensive property.

Explanation:

Ecell is an intensive property as it does not depend upon mass of species (number of particles) but ArG of the cell reaction is an extensive property because this depends upon mass of species (number of particles).

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पाठ 3: Electrochemistry - Exercises [पृष्ठ ३४]

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एनसीईआरटी एक्झांप्लर Chemistry [English] Class 12
पाठ 3 Electrochemistry
Exercises | Q I. 3. | पृष्ठ ३४

संबंधित प्रश्‍न

Arrange the following metals in the order in which they displace each other from the solution of their salts.

\[\ce{Al, Cu, Fe, Mg}\] and \[\ce{Zn}\]


Construct a labelled diagram for the following cell:

`Zn|Zn^(2+)(1M)||H^+(1M)|H_(2(g,1atm))|Pt`


Among Zn and Cu, which would occur more readily in nature as metal and which as an ion?


A solution of CuSO4 is electrolysed using a current of 1.5 amperes for 10 minutes. What mass of Cu is deposited at cathode? [Atomic mass of Cu = 63.7]


If one mole electrons is passed through the solutions of CrCl3, AgNO3 and NiSO4, in what ratio Cr, Ag and Ni will be deposited at the electrodes?


Consider the change in the oxidation state of Bromine corresponding to different emf values as shown in the expression below:

\[\ce{BrO^-_4 ->[1.82 V] BrO^-_3 ->[1.5 V] HBrO ->[1.595 V] Br2 ->[1.0652 V] Br^-}\]

Then the species undergoing disproportionation is:


Cell equation: \[\ce{A + 2B^- -> A^{2+} + 2B}\]

\[\ce{A^{2+} + 2e^- -> A}\] E0 = +0.34 V and log10 k = 15.6 at 300 K for cell reactions find E0 for \[\ce{B^+ + e^- -> B}\]


Describe the electrolysis of molten NaCl using inert electrodes.


Can Fe3+ oxidises bromide to bromine under standard conditions?

Given: \[\ce{E^0_{{Fe^{3+}|Fe^{2+}}}}\] = 0.771 V

\[\ce{E^0_{{Br_{2}|Br^-}}}\] = −1.09 V


Is it possible to store copper sulphate in an iron vessel for a long time?

Given: \[\ce{E^0_{{Cu^{2+}|{Cu}}}}\] = 0.34 V and \[\ce{E^0_{{Fe^{2+}|{Fe}}}}\] = −0.44 V


A copper electrode is dipped in 0.1 M copper sulphate solution at 25°C. Calculate the electrode potential of copper.
[Given: \[\ce{E^0_{{Cu^{2+}|Cu}}}\] = 0.34 V]


Electrode potential for Mg electrode varies according to the equation

`E_(Mg^(2+)  |  Mg) = E_(Mg^(2+)  |  Mg)^Θ - 0.059/2 log  1/([Mg^(2+)])`. The graph of `E_(Mg^(2+)  |  Mg)` vs `log [Mg^(2+)]` is ______.


Assertion: Mercury cell does not give steady potential.

Reason: In the cell reaction, ions are not involved in solution.


Given the data at 25°C

\[\ce{Ag + I- -> AgI + e-}\]; E° = – 0.152 V

\[\ce{Ag -> Ag+ + e-}\]; E° = – 0.800 V

The value of log Ksp for AgI is ______.


If the half-cell reaction A + e → A has a large negative reduction potential, it follow that:-


On which electrode the oxidation reaction takes place?


Galvanic cell is a device in which ______.


What should be the signs (positive/negative) for \[\ce{E^0_{cell}}\] and ΔG0 for a spontaneous redox reaction occurring under standard conditions?


Can we construct an electrochemical cell with two half-cells composed of ZnSO4 solution and zinc electrodes? Explain your answer.


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