Electrochemistry questions
1808 published questions with worked solutions.
- In the cell Pt(s)|H_2(g, 1 bar)|HCl(aq)|AgCl(s)|Ag(s)|Pt(s) the cell potential is 0.92 V when a 10^ -6 molal HCl solution is...
- Consider the following reduction processes: Zn^ 2+ + 2e^- → Zn(s); E° = −0.76 V Ca^ 2+ + 2e^- → Ca(s); E° = −2.87 V Mg^ 2+ + 2e^-...
- The decreasing order of electrical conductivity of the following aqueous solutions is: 0.1 M Formic acid (A), 0.1 M Acetic acid...
- Amongst the following, the form of water with the lowest ionic conductance at 298 K is :
- 108 g of silver (molar mass 108 g mol ^ -1 ) is deposited at cathode from AgNO_3 (aq) solution by a certain quantity of...
- An acidic solution of dichromate is electrolyzed for 8 minutes using 2A current. As per the following equation Cr_2O_7^ 2-...
- Consider the following redox reaction: MnO_4^- + H^+ + H_2C_2O_4 ⇌ Mn^ 2+ + H_2O + CO_2. The standard reduction potentials are...
- The amount of electricity in Coulomb required for the oxidation of 1 mol of H_2O to O_2 is _____ × 10^5 C.
- The potential for the given half cell at 298 K is (–) ________ × 10^ -2 V. 2H^+(aq) + 2e^- → H_2(g), [H^+] = 1M, P_ H_2 = 2 atm...
- Fuel cell, using hydrogen and oxygen as fuels, A. has been used in spaceship B. has as efficiency of 40% to produce electricity...
- For a strong electrolyte, a plot of molar conductivity against (concentration)^ 1/2 is a straight line, with a negative slope,...
- What pressure (bar) of H_2 would be required to make emf of hydrogen electrode zero in pure water at 25ºC?
- One of the commonly used electrode is calomel electrode. Under which of the following categories calomel electrode comes?
- The reaction at cathode in the cells commonly used in clocks involves.
- Molar ionic conductivities of divalent cation and anion are 57 S cm^2 mol^ -1 and 73 S cm^2 mol^ -1 respectively. The molar...
- The quantity of silver deposited when one coulomb charge is passed through AgNO_3 solution:
- For the electro chemical cell M|M^ 2+ ||X|X^ 2- . If E^o_ (M^ 2+ /M) = 0.46 V and E^o_ (X/X^ 2- ) = 0.34 V. Which of the...
- A conductivity cell with two electrodes (dark side) are half filled with infinitely dilute aqueous solution of a weak...
- What would be the electrode potential for the given half cell reaction at pH = 5 ? 2H_2O O_2+4H^ +4e^- ; E^0_ red = 1.23 V (R =...
- For an electrochemical cell Sn(s)|Sn^ 2+ (aq, 1M)||Pb^ 2+ (aq, 1M)|Pb(s) the ratio [ Sn^ 2+ ] [ Pb^ 2+ ] when this cell attains...
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