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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
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
Explain Faraday’s second law of electrolysis
Concept: Electrolytic Cells and Electrolysis
Define entropy.
Concept: Spontaneous (Irreversible) Process
Write mathematical expression of molar conductivity of the given solution at infinite dilution.
Concept: Conductance of Electrolytic Solutions >> Variation of Conductivity and Molar Conductivity with Concentration
Write cathode and anode reaction in a fuel cell.
Concept: Electrochemical Cells
How many faradays of electricity are required to produce 13 gram of aluminium from aluminium chloride solution? (Given: Molar mass of Al = 27.0-gram mol–1)
Concept: Electrolytic Cells and Electrolysis
Calculate the internal energy at 298K for the formation of one mole of ammonia, if the enthalpy change at constant pressure is – 42.0 kJ mol-1.
(Given: R = 8.314 J K-1 mol-1)
Concept: Chemical Thermodynamics and Energetic >> First Law of Thermodynamics
How many faradays of electricity are required to produce 6 g of Mg from MgCl2?
Concept: Electrochemical Cells
How much quantity of electricity in coulomb is required to deposit 1.346 × 10-3 kg of Ag in 3.5 minutes from AgNO3 solution?
( Given: Molar mass of Ag is 108 × 10-3 kg mol-1 )
Concept: Electrolytic Cells and Electrolysis
What is the ‘Ellingham diagram’? Write any ‘two points’ of its significance.
Concept: Relation Between Gibbs Energy Change and Emf of a Cell
The S.I. unit of cell constant for conductivity cell is __________.
Concept: Conductance of Electrolytic Solutions >> Variation of Conductivity and Molar Conductivity with Concentration
Select the most appropriate option.
A gas is allowed to expand in a well-insulated container against a constant external pressure of 2.5 bar from an initial volume of 2.5 L to a final volume of 4.5 L. The change in internal energy, ΔU of the gas will be _______.
Concept: Chemical Thermodynamics
Answer the following in one or two sentences.
Comment on the statement:
no work is involved in an expansion of gas in a vacuum.
Concept: Expression for Pressure-volume (PV) Work
Answer the following in one or two sentences.
State second law of thermodynamics in terms of entropy.
Concept: Spontaneous (Irreversible) Process
