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Draw a neat and well labelled diagram of primary reference electrode.
Concept: Galvanic or Voltaic Cells - Introduction
Conductivity of a solution is 6.23 x 10-5 Ω-1cm-1 and its resistance is 13710Ω. If the electrodes are 0.7cm apart, calculate the cross-sectional area of electrode.
Concept: Conductance of Electrolytic Solutions - Introduction
Define “Molar conductivity”.
Concept: Conductance of Electrolytic Solutions >> Variation of Conductivity and Molar Conductivity with Concentration
On calculating the strength of current in amperes if a charge of 840C (coulomb) passes through an electrolyte in 7 minutes, it will be
- 1
- 2
- 3
- 4
Concept: Electrolytic Cells and Electrolysis - Introduction
The charge of how many coulomb is required to deposit 1.0 g of sodium metal (molar mass 23.0 g mol-1) from sodium ions is -
- 2098
- 96500
- 193000
- 4196
Concept: Electrolytic Cells and Electrolysis - Introduction
Draw neat and labelled diagram of dry cell.
Concept: Batteries >> Primary Batteries
Arrange the following reducing agents in the order of increasing strength under standard state conditions. Justify the answer
|
Element |
Al(s) |
Cu(s) |
Cl(aq) |
Ni(s) |
|
Eo |
-1.66V |
0.34V |
1.36V |
-0.26V |
Concept: Galvanic or Voltaic Cells - Introduction
Write one statement of first law of thermodyamics and its mathematical expression.
Concept: Chemical Thermodynamics and Energetic >> First Law of Thermodynamics
Calculate Ecell and ΔG for the following at 28°C :
Mg(s) + Sn2+( 0.04M ) → Mg2+( 0.06M ) + Sn(s)
E°cell = 2.23V. Is the reaction spontaneous ?
Concept: Galvanic or Voltaic Cells - Introduction
96500 coulombs correspond to the charge on how many electrons?
Concept: Electrolytic Cells and Electrolysis - Introduction
Can copper sulphate solution be stored in an iron vessel? Explain.
Concept: Galvanic or Voltaic Cells - Introduction
Resistance of conductivity cell filled with 0.1 M KCl solution is 100 ohms. If the resistance of the same cell when filled with 0.02 M KCl solution is 520 ohms, calculate the conductivity and molar conductivity of 0.02 M KCl solution. [Given: Conductivity of 0.1 M KCl solution is 1.29 S m-1 .]
Concept: Conductance of Electrolytic Solutions >> Variation of Conductivity and Molar Conductivity with Concentration
The molar conductivity of cation and anion of salt BA are 180 and 220 mhos respectively. The molar conductivity of salt BA at infinite dilution is_____________ .
(a) 90 mhos.cm2
(b) 110 mhos.cm2.mol-1
(c) 200 mhos.cm2.mol-1
(d) 400 mhos.cm2.mol-1
Concept: Conductance of Electrolytic Solutions >> Variation of Conductivity and Molar Conductivity with Concentration
What is the value of for the following reaction at 298 K -
6CO2+ 6H20(l) → C6H1206(s) + 602(g),
Given that: ΔG° = 2879 kj mol-1, AS = -210 JK-1 mol-1.
Concept: Relation Between Gibbs Energy Change and Emf of a Cell
Write any four applications of electrochemical series
Concept: Electrolytic Cells and Electrolysis - Introduction
With the help of the equation ΔG° = - nFEocell. Explain that cell potential is an intensive property.
Concept: Relation Between Gibbs Energy Change and Emf of a Cell
How much electricity in terms of Faraday is required to produce 20 g of Ca from molten CaCl2?
(Given: Molar mass of Calcium is 40 g mol−1.)
Concept: Electrolytic Cells and Electrolysis - Introduction
The conductivity of 0.20 M solution of KCl at 298 K is 0.025 S cm−1. Calculate its molar conductivity.
Concept: Conductance of Electrolytic Solutions >> Variation of Conductivity and Molar Conductivity with Concentration
The standard e.m.f of the following cell is 0.463 V
`Cu|Cu_(1m)^(++)`
What is the standard potential of Cu electrode?
(A) 1.137 V
(B) 0.337 V
(C) 0.463 V
(D) - 0.463 V
Concept: Galvanic or Voltaic Cells - Introduction
State Kohlrausch Law.
Concept: Conductance of Electrolytic Solutions >> Variation of Conductivity and Molar Conductivity with Concentration
