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Write cell reaction in lead storage battery during discharge.
Concept: Batteries >> Primary Batteries
Prove that ΔH=ΔU+ΔnRT. what is the condition under which ΔU=ΔH?
Concept: Chemical Thermodynamics and Energetic >> First Law of Thermodynamics
Derive a relation between ΔH and ΔU for a chemical reaction. Draw neat labelled diagram of calomel electrode. Resistance and conductivity of a cell containing 0.001 M KCI solution at 298K are 1500Ω and 1.46x10-4 S.cm-1 respectively.
Concept: Electrochemical Cells
Number of faradays of electricity required to liberate 12 g of hydrogen is:
Concept: Electrolytic Cells and Electrolysis - Introduction
Calculate E°cell for the following reaction at 298 K:
2Al(s) + 3Cu+2(0.01M) → 2Al+3(0.01M) + 3Cu(s)
Given: Ecell = 1.98V
Concept: Galvanic or Voltaic Cells - Introduction
The conductivity of 0.001 mol L-1 solution of CH3COOH is 3.905× 10-5 S cm-1. Calculate its molar conductivity and degree of dissociation (α) Given λ°(H+)= 349.6 S cm2 mol-1 and λ°(CH3COO)= 40.9S cm2mol-1.
Concept: Conductance of Electrolytic Solutions >> Variation of Conductivity and Molar Conductivity with Concentration
Define electrochemical cell
Concept: Batteries >> Primary Batteries
Following reactions occur at cathode during the electrolysis of aqueous sodium chloride solution:
Na+(aq) + e− ⟶ Na (s) E0 = 2.71 V
H+(aq) + e− ⟶ `1/2` H2 (g) E0 = 0.00 V
On the basis of their standard reduction electrode potential (E0) values, which reaction is feasible at the cathode and why?
Concept: Electrolytic Cells and Electrolysis - Introduction
Why does the cell potential of mercury cell remain constant throughout its life?
Concept: Batteries >> Primary Batteries
Define the following terms: Molar conductivity (⋀m)
Concept: Conductance of Electrolytic Solutions >> Variation of Conductivity and Molar Conductivity with Concentration
Define the following terms: Secondary batteries
Concept: Batteries >> Primary Batteries
On passing 1.5 F charge, the number of moles of aluminium deposited at cathode are _______ [Molar mass of Al = 27 gram mol–1]
(A) 1.0
(B) 13.5
(C) 0.50
(D) 0.75
Concept: Electrolytic Cells and Electrolysis - Introduction
Write any two uses of H2SO4
Concept: Electrolytic Cells and Electrolysis - Introduction
In the representation of the galvanic cell, the ions in the same phase are separated by a _______.
Concept: Galvanic or Voltaic Cells - Introduction
10.0 grams of caustic soda when dissolved in 250 cm3 of water, the resultant gram molarity of solution is _______.
(A) 0.25 M
(B) 0.5 M
(C) 1.0 M
(D) 0.1 M
Concept: Conductance of Electrolytic Solutions >> Variation of Conductivity and Molar Conductivity with Concentration
Construct a labelled diagram for the following cell:
`Zn|Zn^(2+)(1M)||H^+(1M)|H_(2(g,1atm))|Pt`
Concept: Electrochemical Cells
Write the cell representation and calculate equilibrium constant for the following redox reaction:
`Ni_((s))+2Ag_((aq))^+ (1M)->Ni_((aq))^(2+)(1M)+2Ag_((s)) " at "25^@ C`
`E_(ni)^+`=-0.25V and `E_(Ag)^+=0.799V`
Concept: Redox Reaction
Write any ‘two’ advantages of calomel electrode.
Concept: Relation Between Gibbs Energy Change and Emf of a Cell
Potential of saturated calomel electrode is-
Concept: Relation Between Gibbs Energy Change and Emf of a Cell
Write the Nernst equation and explain the terms involved.
Concept: Nernst Equation - Introduction
