मराठी
महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता १२ वी

Consider the half reactions with standard potentials. i. AgA(aq)⊕+eA⊖⟶AgA(s)EA∘= 0.8V ii. IA2A(s)+2eA⊖⟶2IA⊖A(aq) EA∘= 0.53V iii. PbA2⊕A(aq)+2eA⊖⟶PbA(s) EA∘=−0.13V iv. FeA2⊕+2eA⊖⟶FeA(s) EA∘=−0.44V The

Advertisements
Advertisements

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 ______.

पर्याय

  • \[\ce{Ag and Fe^{2\oplus}}\]

  • \[\ce{Ag^{\oplus} and Fe}\]

  • \[\ce{Pb^{2\oplus} and I}\]

  • \[\ce{I2 and Fe^{2\oplus}}\]

MCQ
रिकाम्या जागा भरा
Advertisements

उत्तर

The strongest oxidising  and reducing agents respectively are \[\ce{Ag^{\oplus} and Fe}\].

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 5: Electrochemistry - Exercises [पृष्ठ ११७]

APPEARS IN

बालभारती Chemistry [English] Standard 12 Maharashtra State Board
पाठ 5 Electrochemistry
Exercises | Q 1.06 | पृष्ठ ११७

संबंधित प्रश्‍न

Choose the most correct option.

The standard potential of the cell in which the following reaction occurs:
H2 (g,1 atm) + Cu2+ (1M) → 2H+ (1M) + Cu(s),
`("E"_"Cu"^circ = 0.34 "V")` is


Answer the following in one or two sentences.

What is standard cell potential for the reaction

\[\ce{3Ni_{(s)} + 2Al^{3+} (1M) → 3Ni^{2+} (1M) + 2Al(s)}\], if `E_"Ni"^circ` = –0.25 V and  `"E"_("Al")^circ` = –1.66 V?


Answer the following in one or two sentences.

Write Nernst equation. What part of it represents the correction factor for nonstandard state conditions?


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 \[\ce{E{^{\circ}_{cell}}}\]


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"))`


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.


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


Calculate \[\ce{E^0_{cell}}\] for the following cell.

\[\ce{Cr_{(s)} | Cr^{3+}_{( aq)} || Fe^{2+}){( aq)} | Fe_{(s)}}\]

Given: `"E"_("Cr"^(3+)//"Cr")^0` = −0.74 V,

`"E"_("Fe"^(2+)//"Fe")^0` = −0.44 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

What is the ΔG0 for the following reaction?

\[\ce{Al_{(s)} + Fe^{3+}_{( aq)} -> Al^{3+}_{( aq)} + Fe_{(s)}}\]; \[\ce{E^0_{cell}}\] = +2.43


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?


Answer the following in one or two sentences.

What is the standard cell potential for the reaction?

\[\ce{2Al(s) + 3Ni^{2⊕}(1M) -> 2Al^{3⊕}(1 M) + 3Ni(s)}\]

if \[\ce{E{^{\circ}_{Ni}}}\] = −0.25 V and \[\ce{E{^{\circ}_{Al}}}\] = −1.66 V?


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


Define standard electrode potential.


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 net cell reaction.


Write the four applications of emf series.


Standard potential (E°) of

\[\mathrm{Zn_{(aq)}^{+2}+2e^{-}\longrightarrow Zn_{(s)}~is~-0.76~V}\]

What is standard potential of reaction 

\[2\mathrm{Zn}_{(\mathrm{s})}\longrightarrow2\mathrm{Zn}_{(\mathrm{aq})}^{+2}+4\mathrm{e}^{-}\] ?


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?


Which from following is CORRECT expression for Ecell of following cell?

\[\ce{Pb_{(s)} | Pb^++_{(1 m)} || Ag^+_{(0.1 m)} | Ag_{(g)}}\] at 25°C?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×