25 - Electrochemistry Questions Answers

An aqueous solution of acetic acid is slowly added to an aqueous solution of KOH .The variation in conductivity of this reaction is?

Asked By: SUSHOVAN HALDAR 3 year ago
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A current of 0.965 ampere is passed through 500ml of 0.2 M solution of ZnSO4 for 10 minutes. The molarity of Zn2+ after deposition of zinc is

1. 0.1M 
2. 0.5M 
3. 0.8M 
4. 0.194M

Asked By: SWATI KAPOOR 5 year ago
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Zn!Zn2+ !! Cu2+!Cu E° for the cell is 1.10V at 25°C. The equilibrium constant for the cell reaction is of the order of

(1) 10-37    (2) 1037    (3) 10-17

Asked By: SWATI KAPOOR 5 year ago
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Standard cell voltage for the cell Pb/Pb2+!! Sn2+/Sn is -0.01V. If the cell is to be exhibit Ecell=0, the value of [Sn2+] / [Pb2+] should be antilog of  

(1) 0.01    (2) 0.5   (3) 1.5    (4) -0.5

Asked By: SWATI KAPOOR 5 year ago
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EMF of Ni(s) ! Ni2+(aq) !! Cu2+ (aq) ! Cu(s) cell can be increased by

(1) Adding NH3 in the right half-cell

(2) Increasing the conc. of Ni2+ ions

(3) Adding dimethyl glyoxime into the left half-cell

(4) Changing the electrolyte present in salt bridge 

Asked By: SWATI KAPOOR 5 year ago
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The EMF of the cell Ag/AgCl (Ksp) (saturated solution) ! Cl- (c1) !! AgCl (Ksp)!Ag is given by

Asked By: SWATI KAPOOR 5 year ago
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If equal quantities of electricity are passed through three voltmeter containing FeSO4, Fe2(SO4)and Fe(NO3)3, then which of the following is not true?

(1) Amount of iron deposited in FeSO4 and Fe2(SO4)is equal

(2) Amount of iron deposited in Fe(NO3)3 is 2/3 of the amount of iron deposited in FeSO4

(3) Same gas will evolve in all three cases at anode 

 

Asked By: SWATI KAPOOR 5 year ago
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Which of the following solution will have the highest specific conductance  (1) 0.01 M CH3COOH   (2) 0.01 M NaCl   (3) 0.01 M NH4OH   (4) 0.01 M K2SO4

Asked By: SWATI KAPOOR 5 year ago
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If G for the reaction is A+ + B- = A2+ + B2- is x, the ΔG for the reaction is 1/2 A+ + 1/2 B- = 1/2 A2+ + 1/2 B2- is

Asked By: SWATI KAPOOR 5 year ago
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During electrolysis of aqueous solution of a salt pH in the space near one of the electrodes is increased. Which of the following salt solution is electrolysed? 

 (1) KCl    (2) CuCl2   (3) CuSO4

Asked By: SWATI KAPOOR 5 year ago
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