(i) Indicate the principle behind the method used for the refining of Nickel. (ii) What is the role of dilute NaCN in the extraction of gold? (iii) What is ‘copper matte’?

Q: estimate the fraction of electrons above fermi level in sodium and copper at room temperature

A:

Q: A 1.1324 g sample of magnetite ore was dissolved in concentrated HCl to give a solution that…

A: Mass of Fe = 55.845 g/molMass Fe2O3 = 159.69 g/mol

Q: Draw the structures of manganate and permanganate ions and predict their magnetic character.

A: Draw the structures of manganate and permanganate ions and predict their magnetic character.

Q: (i) Name the method of refining of metals such as Germanium.(ii) In the extraction of Al, impure…

A: Refining is a process of eliminating impurities to obtain metals of high purity. These impurities…

Q: A solution was prepared by dissolving 1210 mg of K3Fe(CN)6 (329.2 g/mol) in sufficient water to give…

A: Given, mass of K3Fe(CN)6 = 1210 mg = 1.210 g Molar mass of K3Fe(CN)6 = 329.2 g/mol Volume of…

Q: What is the significance of leaching in the extraction of aluminium ?

A:

Q: The magnetic susceptibility, lefi, of a sample of solid K3COF, at room temperature as measured using…

A: The answer is attached below-

Q: 2. Explain the principle of ion exchange adsorption.

A: The adsorption results in the formation of a molecular layer of the adsorbate on the surface.…

Q: Write the role of the following: (i) CO in the purification of nickel (ii) Graphite rod in the…

A: The Mond’s process is used for the purification of nickel. This process is also called as carbonyl…

Q: What are the silicate minerals, and enlist the industries using them as raw materials?

A: Silicate minerals are the rock making minerals that are made up of silicate groups. Or we can say…

Q: Write the chemical equation that describes the dissolution of gypsum in water and describe how many…

A: Gypsum dissociates in water to form its ions.

Q: Calculate the composition, in weight percent, of an alloy that contains 105 kg of iron, 0.2 kg of…

A:

Q: Thiosulfate ion (S2O32-) disproportionates in acidic solution to give solid sulfur and aqueous…

A: A Disproportionation reaction is a reaction in which a compound undergoes oxidation as well as…

Q: The oxidation number of platinum in Pt(H2O)4 ^+2 is

A:

Q: What is rock salt? Mention its colour and the reason due to which it has this colour ?

A: Salt is a mineral consisting predominantly of sodium chloride, a chemical element that belongs to a…

Q: Describe the principle involved in each of the following processes :(i) Zone refining of metals(ii)…

A: (i) Zone Refining of metals : The principle of zone refining is based on the principle that…

Q: Explain why the energetics of dissolution can be different for elements in the same group?

A: Dissolution energy is defined as the amount of energy released when a solute is dissolved in a…

Q: what is the role of silica in the metallurgy of copper?

A: The most important ore of copper found on the earth is the copper-pyrite ore whose chemical formula…

Q: On what principle is the method of zone refining of metals based?

A: In nature,metals are not found in pure form . They exist in the form of compounds called ores.Metals…

Q: what volume of decinormal k2cr2o7 solution would be needed to convert 1.19 g of tin to stannic…

A:

Q: Consider the solutions presented: (a) Which of the following sketches best represents the ions in a…

A: Solution is made up of a solute and solvent, its concentration is same in the whole solution. In a…

Q: The reaction 2A(g) ⇌ B(g) is found to have Kp = 24.5. What would the equilibrium constant be for…

A:

Q: Crystals of a substance changed their colour on heating in a closed testtube but regained it after…

A: A chemical reaction involves the reactants, substrates, catalyst, temperature-pressure conditions,…

Q: What is the role of CO2 in the extractive metallurgy of aluminium from its ore?

A: The entire scientific and technological processes involved in the extraction and isolation of a pure…

Q: What is the role of zinc metal in the extraction of silver?

A: A separation method involving the separation of a material from a matrix is called as extraction…

Q: discuss the importace and methods of solid liquid separation processes of hydro metallurgy

A:

Q: (b) What is the principle of 'Carbonate conditioning'? Why it fails in High Pressure Boilers? Give…

A: Please find your solution below : Carbonate conditioning is one of the important internal…

Q: 2. What is the effect of the nature of solvent on the electrical conductivity of solutions?

A: Conductivity in an electrolytic solution is due to movement of ions. More the ions more the…

Q: What is the concentration in parts per million of a 0.00175% w/v solution of mercuric nitrate?

A:

Q: What is the role of NaOH in the metallurgy of aluminium?

A: Given: The extraction of aluminium is done from its ore called bauxite, Al2O3.2H2O. There are…

Q: 5. What is the composition, in atom percent, of an alloy that consists of 30 wt% Zn and 70 wt% Cu?

A:

Q: . Fulgurites are the products of the melting that occurswhen lightning strikes the earth.…

A: The given data contains, mass % of Fe = 46.01 % mass % of Si = 53.99 % Molar mass of Fe= 55.845…

Q: Give a proposal for the purification of Cobalt(II)sulphate CoSO4.7H2O

A: Cobalt (II)Sulphate CoSO4.7H2O ,is an important salt of cobalt , it holds important place in…