HARD
JEE Main
IMPORTANT
Earn 100

An electrode is prepared by dipping a silver strip into a solution saturated with silver thiocyanate, AgSCN, and containing 0.10 M SCN-. The emf of the voltaic cell constructed by connecting this electrode as the cathode to the standard hydrogen half cell as the anode is 0.45 V. What is the solubility product of AgSCN? E0Ag+|Ag = 0.80. If your answer is y × 10-7. then y is

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Important Questions on Electromotive Force

HARD
JEE Main
IMPORTANT

Calculate equilibrium constant for the equilibrium,

2MnO4-+6H++5H2C2O42Mn2++8H2O+10CO2

Given that, EMnO4-/ Mn2+0=1.51 V and E0CO2/C2O42-=-0.49 V. The value of equilibrium constant is 10x, find the value of x upto the nearest integer.

MEDIUM
JEE Main
IMPORTANT
Which of the following statements is wrong about galvanic cells?
EASY
JEE Main
IMPORTANT

In the galvanic cell CuCu2+(1 M) Ag+(1 M)Ag, the electrons will travel in the external circuit:

MEDIUM
JEE Main
IMPORTANT
Is 1 M H+ solution under hydrogen gas at 1 atm, capable of oxidising Ag metal in the presence of 1 M Ag+?
MEDIUM
JEE Main
IMPORTANT
The potential of hydrogen electrode is -118 mV. The concentration of H+ in the solution is
EASY
JEE Main
IMPORTANT
E0 for the half cell Zn2+| Zn is -0.76 Vemf of the cell Zn  Zn2+(1 M)  2H+(1 M)H2(1 atm) is
EASY
JEE Main
IMPORTANT

The standard reduction potentials at 298 K for the following half-reactions are given against each.

Zn2++2e-Zn; E0=-0.762 VCr3++3e-Cr; E0=-0.74 V2H++2e-H2; E0=0.0 VFe3++e-Fe2+; E0=+0.77 V.

Which is the strongest reducing agent?