Advertisements
Advertisements
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
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
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 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
Draw neat labelled diagram of electrolytic refining of blister copper
Concept: Electrolytic Cells and Electrolysis - Introduction
The conductivity of 0.02 M AgNO3 at 25°C is 2.428 × 10−3 Ω−1 cm−1. What is its molar conductivity?
Concept: Conductance of Electrolytic Solutions >> Variation of Conductivity and Molar Conductivity with Concentration
What is the ratio of volumes of H2 and O2 liberated during electrolysis of acidified water?
(A) 1 : 2
(B) 2 : 1
(C) 1 : 8
(D) 8 : 1
Concept: Electrolytic Cells and Electrolysis - Introduction
Explain Faraday’s second law of electrolysis
Concept: Electrolytic Cells and Electrolysis - Introduction
