19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
The electrochemical cell stops working after some time because
Which of the following has been universally accepted as a reference electrode at all temperatures and has been assigned a value of zero volts?
Standard solution of KNO3 is used to make salt bridge because
Which one of the following is not a function of a salt bridge?
If the salt bridge is removed suddenly from a working cell, the voltage
Standard electrode potential of cell is (EºAg+/Ag = 0.80V)
The equivalent conductance of M / 32 solution of a weak monobasic acid is 8.0 mho cm2 eq–1and at infinite dilution is 400 mho cm2 eq–1. The dissociation constant of this acid is [CBSE AIPMT 2010]
Galvanic cell is a device in which
How many coulombs are required to deposit 50 g of aluminium when the electrode reaction is Al 3e Al -> [RPMT 2010]
Which one of the following is not a function of a salt bridge?
For the reduction of silver ions with copper metal, the standard cell potential was found to be +0.46 V at 25ºC. The value of standard Gibbs energy, ∆Gº will be (F = 96500 C mol–1) [CBSE AIPMT 2010]
Which of the following has been universally accepted as a reference electrode at all temperatures and has been assigned a value of zero volts?
Standard electrode potential for Sn4+/Sn2+ couple is +0.15 V and that for the Cr3+/Cr couple is –0.74V. These two couples in their standard state are connected to make a cell. The cell potential will be: [AIPMT 2011]
If the salt bridge is removed suddenly from a working cell, the voltage
Standard electrode potential of cell is (EºAg+/Ag = 0.80V)
Which of the following expressions correctly represents the equivalent conductance at infinite dilution of Al2(SO4)3, Given that o Al and o SO are the equivalent conductance at infinite dilution of the respective …
Assertion (A) On dilution, the equivalent as well as molar conductivity of solution increases. Reason (R) With dilution, the number of current carrying particles per cm3 increases. [AIIMS 2010]
Cr O 14H 6e 2Cr 7H O; -> E 1.33V. At [Cr O ]l 4.5 millimoles, [Cr3+] = 15 millimoles, E is 1.067 V. The pH of the solution is nearly equal to [KCET 2016]
At 18º C, the conductance of H+ and CH3COO– at infinite dilution are 315 and 35 mho cn2 eq–1 respectively. The equivalent conductivity of CH3 COOH at infinite dilution is…..mho cm2 eq–1 [CBSE AIPMT 2010]
When iron is rusted, it is [MP PMT 2010]
Which one of the following statements is incorrect regarding an electrochemical cell?
What is the cell reaction occurring in Daniell cell (Galvanic cell)? (a) Cu s ZnSO aq CuSO aq Zn s -> (b) Zn s CuSO aq Cu s ZnSO -> (c) Ni s ZnSO aq NiSO s Zn s -> (d) 2Na s CdSO aq Na SO aq…
Which cell converts electrical energy into chemical energy?
Standard solution of KNO3 is used to make salt bridge because
The electrochemical cell stops working after some time because