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महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता १२ वी

The standard potential of the cell in the following reaction is ______. CdA(s)+CuA(1M)2+⟶CdA(1M)2++CuA(s) ECdECu(ECd∘=-0.403V,ECu∘=0.334V)

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प्रश्न

The standard potential of the cell in the following reaction is ______.

\[\ce{Cd_{(s)} + Cu^{2+}_{(1M)} -> Cd^{2+}_{(1M)} + Cu_{(s)}}\]

`("E"_("Cd")^circ = - 0.403V, "E"_("Cu")^circ = 0.334V)`

पर्याय

  • – 0.737 V

  • 0.737 V

  • – 0.069 V

  • 0.069 V

MCQ
रिकाम्या जागा भरा
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उत्तर

The standard potential of the cell in the following reaction is 0.737 V.

Explanation:

`"E"_"cell"^circ = "E"_"RHE"^circ - "E"_"LHE"^circ`

= 0.334 – (– 0.403 V)

= 0.737 V

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2021-2022 (March) Set 1

संबंधित प्रश्‍न

Consider the half reactions with standard potentials.

  1. \[\ce{Ag^{\oplus}_{ (aq)} + e^{\ominus} -> Ag_{(s)}E^\circ = 0.8 V}\] 
  2. \[\ce{I2_{(s)} + 2e^\ominus -> 2I^{\ominus}_{(aq)} E^\circ = 0.53V}\]
  3. \[\ce{Pb^{2\oplus}_{(aq)} + 2e^{\ominus} -> Pb_{(s)} E^\circ = -0.13 V}\]
  4. \[\ce{Fe^{2\oplus} + 2e^{\ominus} -> Fe_{(s)} E^\circ = -0.44 V}\]

The strongest oxidising  and reducing agents respectively are ______.


Answer the following in brief.

Construct a galvanic cell from the electrodes Co3+ | Co and Mn2+/Mn. \[\ce{E{^{\circ}_{Co}}}\] = 1.82 V, \[\ce{E{^{\circ}_{Mn}}}\] = –1.18 V. Calculate \[\ce{E{^{\circ}_{cell}}}\]


Calculate emf of the cell at 25°C.

Zn(s) | Zn2+ (0.08 M) || Cr3+ (0.1 M) | Cr(s)

`E_(Zn)^0` = −0.76 V,  `E_(Cr)^0` = −0.74 V


Answer the following:

Predict whether the following reaction would occur spontaneously under standard state condition.

`"Ca"_(("s")) + "Cd"_(("aq"))^(2+) -> "Ca"_(("aq"))^(2+) + "Cd"_(("s"))`


Answer the following:

Predict whether the following reaction would occur spontaneously under standard state condition.

`2"Br"_(("aq"))^(-) + "Sn"_(("aq"))^(2+) -> "Br"_(2("l")) + "Sn"_(("s"))`


What is cell voltage?


Calculate the voltage of the cell Sn(s) / Sn2+(0.02 M) // Ag+ (0.01 M) / Ag(s) at 25 °C.

Given: `"E"_"Sn"^circ` = - 0.136, `"E"_"Ag"^circ` = 0.800 V


Calculate `"E"_"cell"^circ` of the following galvanic cell:

Mg(s) / Mg2+(1 M) // Ag+ (1 M) / Ag(s) if `"E"_"Mg"^circ` = – 2.37 V and `"E"_"Ag"^circ` = 0.8 V. Write cell reactions involved in the above cell. Also mention if cell reaction is spontaneous or not.


Standard reduction electrode potentials of three metals A, B and C are +0.5 V, −3.0 V and −1.2 V respectively. The reducing power of these metals is ______.


The correct representation of Nernst's equation for half-cell reaction \[\ce{Cu^{2+} (aq) + e^- -> Cu^+(aq)}\] is ______.


Nernst equation for the following cell reaction at 298 K is:

\[\ce{Mg_{(s)} | Mg^{2+}_{( aq)} || Ag^+_{( aq)} | Ag_{(s)}}\]


Calculate E.M.F. of following cell at 298 K Zn(s) |ZnSO4 (0.01 M)| |CuSO4 (1.0 M)| Cu(s) if \[\ce{E^0_{cell}}\] = 2.0 V.


Identify the strongest reducing agent from the data given below:

Element `"E"^0 ("V")`
Al −1.66
Fe −0.44
Hg +0.79
Cu +0.337

For the following cell, standard potential of copper electrode is 0.337 V and standard cell potential is 0.463 V.

\[\ce{Cu | Cu^{2+} (1 M) || Ag^+ (1 M)  Ag}\]

What is the standard potential of silver electrode?


The standard electrode potential of Zn and Ni are - 0.76 V and - 0.25 V respectively. If the reaction takes place in the cell constructed between these two electrodes is spontaneous. What is the standard emf of the cell?


The standard EMF for the cell reaction,
\[\ce{Zn + Cu^{2+} -> Zn^{2+} + Cu}\], 
is 1.10 V at 25°C. The EMF of the cell reaction, when 0.1 M Cu2+ and 0.1 M Zn2+ solutions are used at 25°C is:


Which element from the following has the highest negative standard reduction potential?


Construct a cell from Ni2+ | Ni and Cu2+ | Cu Cu half cells. Write the cell reaction and calculate `E_("cell")^0`   
`(E_("Ni")^0 = - 0.236  V and E_("Cu")^0 = + 0.337  V)`


Calculate the emf of the following cell at 25°C.

Zn(s)|Zn2+(0.08 M) || Cu2+(0.l M) |Cu(s)

E0zn = − 0.76 V, E0cu = 0.36 V.


Write the value of `(2.303 RT)/F` in the Nernst equation?


If \[\mathrm{E^o\left(Cd_{(aq)}^{+2}|Cd_{(s)}\right)=-0.40~V}\]. What is potential for \[\mathrm{Cd}_{(s)}\xrightarrow{}\mathrm{Cd}_{(aq)}^{+2}\left(0.01\mathrm{M}\right)+2\mathrm{e}^{-}\] at 298 K?


What is the reduction potential of hydrogen gas electrode when pure hydrogen gas is at 1 atmosphere pressure and platinum electrode is in contact with HCI of pH 2 at 298 K?


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