Electrochemistry questions
1808 published questions with worked solutions.
- The standard emf of a galvanic cell involving cell reaction with n = 2 was found to be 0.295 V at 25℃. The equilibrium constant...
- Which of the following statement is INCORRECT with respect to metallic or electronic conductivity? [GUJ CET 2014]
- Two faradays of electricity is passed through a solution of CuSO_4 . The mass of copper deposited at the cathode is _______ (At....
- If the E^ _ cell for a given reaction has a negative value, then which of the following gives the CORRECT relationships for the...
- Reduction potentials of A, B, C and D are 0.8 V, 0.79 V, 0.34 V and −2.37 V respectively. Which element displaces all the other...
- A current of 10 amperes is passed through acidulated water for 80 minutes. The volume of hydrogen gas liberated is _______
- The reaction 12 H_2(g) + AgCl(s) H^+(aq) + Cl^-(aq) + Ag(s) occurs in which of the following the galvanic cell?
- What will be the electrode potential of that hydrogen electrode which is filled with HCl solution of pH value 1.0?
- When electric current is passed through a cell having an electrolyte, the positive ions move towards the cathode and the negative...
- E^ values of Mg^ 2+ /Mg is −2.37 V, of Zn^ 2+ /Zn is −0.76 V and Fe^ 2+ /Fe is −0.44 V. Which of the following statements is...
- Electrolyte: KCl, KNO_3 , HCl, NaOAc, NaCl ^ ( S ,cm^2 ,mol^ -1 ): 149.9, 145.0, 426.2, 91.0, 126.5 Calculate ^ _ HOAc using...
- Electrolysis of aqueous HCl solution produces _______
- Which among the following solutions is NOT used in determination of the cell constant? [MH CET 2015]
- The rusting of iron takes place as follows 2H^+ + 2e^- + 12 O_2 H_2O( l ) ; E^ = +1.23 V Fe^ 2+ + 2e^- Fe(s) ; E^ = -0.44 V...
- At temperature of 298 K, the emf of the following electrochemical cell Ag(s)|Ag^+(0.1 M)|Zn^ 2+ (0.1 M)|Zn(s) will be _______...
- Water is a non-electrolyte but conducts electricity on dissolving a small quantity of _________
- For hydrogen – oxygen fuel cell at one atm and 298 K, H_2(g) + 12 O_2(g) H_2O( l ) ; G^ = -240 kJ E^ for the cell is...
- Which one of the following has the highest molar conductivity?
- Conductivity of 0.01 M NaCl solution is 0.00147 ohm^ -1 ,cm^ -1 . What happens to this conductivity if extra 100 mL of H_2O will...
- Resistance of 0.2 M solution of an electrolyte is 50 Ω. The specific conductance of the solution is 1.3 S ,m^ -1 . If resistance...
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