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Calculate molar conductivity for 0.5 M BaCl2 if its conductivity at 298K is 0.01 Ω–1 cm–1.
Concept: Electrical Conductance of Solution
Calculate standard Gibbs energy change at 25°C for the cell reaction.
\[\ce{Cd_{(s)} + Sn^{2+}_{ (aq)} -> Cd^{2+}_{ (aq)} + Sn_{(s)}}\]
\[\ce{E^0_{cd}}\] = –0.403 V, \[\ce{E^0_{Sn}}\] = –0.136 V
Concept: Thermodynamics of Galvanic Cells
Draw labelled diagram of H2 – O2 fuel cell.
Concept: Fuel Cells
What is the SI unit of molar conductivity?
Concept: Electrical Conductance of Solution
Write any two difficulties of setting SHE (Standard Hydrogen Electrode).
Concept: Reference Electrodes
Write the net cell reaction during discharging of lead accumulator.
Concept: Galvanic Cells Useful in Day-to-day Life
Write the names and chemical formulae of any one ore of zinc.
Concept: Occurrence of Metals
Write the names and chemical formulae of any one ore of iron.
Concept: Occurrence of Metals
What are Ellingham's diagrams? Write 2 features of it.
Concept: Thermodynamic Principles of Metallurgy
The process of leaching alumina, using sodium carbonate is called
- Bayer's process
- Decomposition
- Cyanide process
- Hall's process
Concept: Occurrence of Metals
What is the chemical composition of malachite?
- CuO . CuC03
- Cu(OH)2 CuC03
- CuO.Cu(OH)2
- Cu2O . Cu(OH)2
Concept: Occurrence of Metals
The integrated rate equation for first order reaction is A → products
Concept: Half Life Period of a Reaction
Explain calcination with reactions.
Concept: Oxidation Reduction
Sucrose decomposes in acid solution into glucose and fructose according to the first order rate law with t1/2 = 3 hours. What fraction of the sample of sucrose remains after 8 hours?
Concept: First Order Reactions
Write the reactions involved in the zone of reduction in blast furnace during extraction of iron.
Concept: Occurrence of Metals
The rate constant for a first order reaction is 100 s–1. The time required for completion of 50% of reaction is _______.
(A) 0.0693 milliseconds
(B) 0.693 milliseconds
(C) 6.93 milliseconds
(D) 69.3 milliseconds
Concept: Half Life Period of a Reaction
Silica is added to roasted copper ore during smelting process to remove _______.
(A) ferrous sulphide
(B) ferrous oxide
(C) cuprous sulphide
(D) cuprous oxide
Concept: Occurrence of Metals
Define Hydrometallurgy?
Concept: Oxidation Reduction
Explain refining of nickel by Mond process.
Concept: Electrochemical Principles of Metallurgy
What is the process in which concentrated ore is reduced to the corresponding metal by heating at high temperature with a reducing agent?
(a) Polling
(b) Pyrometallurgy
(c) Hydrometallurgy
(d) Calcination
Concept: Oxidation Reduction
