Name the principal ore of aluminium. Explain the significance of leaching in the extraction of aluminium.

Q: 6 The graphite anodes have to be replaced regularly. Why is this? 7 Why is it so much more…

A: Bauxite is a sedimentary rock and it is the ore of Aluminum. The chemical composition of bauxite is…

Q: Why is the formation of slag useful during the smelting of iron?

A: During smelting of iron to extract the pure iron the temperature is about 1123K. Here the flux CaO…

Q: Qualitatively predict the trends in melting point, boiling point, and hardness of metals?

A: Melting Point : If we compare two closely associated elements (one metal and other non metal) then…

Q: Boron nitride (BN) is made by the reaction of boron trichloride with ammonia.(a) Write a balanced…

A:

Q: Which acid is the best for acid leaching of graphite on the basis of environmental impact ? alkali…

A: Which acid is the best for acid leaching of graphite on the basis of environmental impact ? alkali…

Q: >What compound has been historically used to leach gold from gold ores? Why is this process being…

A: The compound that has been used to leach gold from gold ores is sodium cyanide.

Q: >Name three advantages of making metal components from the powder metallurgical process.

A: The important three advantages of Powder metallurgy are given below.

Q: Write some advantages and disadvantages of ceramic materials compared to metals?

A: Metal is a very broad term in itself but in general metals are those chemical elements that are…

Q: Which of the following substances is added to the blast furnace (together with the iron ore and…

A: Iron contains impurities of silica(SiO2).

Q: Why is there a need for 2 indicators in the analysis of mixed alkali? How do the two indicators help…

A: For a mixed alkali ( two alkalis having different pH range ) we use 2 indicators.

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

A:

Q: What is the main element used in the manufacture of solar cells. Explain how additional elements are…

A: Silicon, the most common semiconductor material used in solar cells, representing approximately 95%…

Q: (a) Giving examples differentiate between calcination and roasting.(b) What is the role of cryolite…

A: Hello. Since more than one question has been asked, the first question shall only be answered in…

Q: Why are sulphide ores converted to oxide before reduction?

A: The main principle of conversion of ores into respective metal is that ores must be changed into…

Q: Name the three (3) unit cells commonly found in metal structures and briefly explain the method of…

A: Unit cell is the repeating unit of a lattice. It has net symmetry that a crystal possesses. Due to…

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

A:

Q: c) Quenching is employed to harden metallic materials. i. Explain the process of transforming PLAIN…

A: 1. Answer - Martensitic transformation - Martensitic transformation of shape memory alloys is 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: (i) Indicate the principle behind the method used for the refining of Nickel. (ii) What is the role…

A: The process used for metal extraction in the pure form is named Metallurgy. Metals are extracted…

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: (а) Give an example of zone refining of metals. (b) What is the role of cryolite in the metallurgy…

A: Metallurgy is the process which is more concern with the extraction and isolation of metals from its…

Q: How can you separate alumina (Al2O3) from silica present in bauxite ore? Write the chemical…

A: Filtering of aluminum from bauxite: Finely powdered bauxite metal is processed with a watery…

Q: Why does silica operate at highly temperature

A: Silica is widely used in industry. Since it can withstand high temperature.

Q: Why are metals such as Ni and Co economical to mine and use in industrial processes even though they…

A: The major use of metals Co and Ni in industry is due to the reason that they are ferromagnetic in…

Q: The production of high-grade iron from hematite and magnetite using a blast furnace involves several…

A: Extraction of Iron Metals are extracted and isolated over the course of a few key steps: Ore…

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: Using Table 22.1, predict the structure of each of the fol- lowing silicate minerals (network,…

A: Following structures are

Q: Where is the final purification of iron and the production of various forms of steel carried out?…

A: To determine: Where is the final purification of iron and the production of various forms of steel…

Q: Describe the composition of Glass electrode used for the pH measurements?

A:

Q: What is metallic glass? Describe the features that promote high glass-forming ability in metals.

A: Metallic glass: It is an amorphous metal alloy. The atoms in the materials are decorated by…

Q: Describe the Mond process?

A: Mond process is used for refining nickel. This process takes place at very high temperatures.

Q: The earthy impurities associated with mineral used in metallurgy are called(a) Slag(b) Flux(c)…

A: Gangue is the earthly impirity associated with minerals.

Q: What is the basic principle of zone refining of metals?

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

Q: Explain about passivation in metals

A:

Q: The production of high-grade iron from hematite and magnetite using a blast furnace involves several…

A:

Crystal Lattices and Unit Cell

Consider a crystal. The regular and repeating pattern of constituent particles is the most distinguishing feature of crystalline solids. A crystal lattice is formed when these particles are replaced with representative points. The three-dimensional arrangement of constituent particles is known as a crystal lattice. Unit cell is that the smallest portion of a space lattice which when repeated in several directions, generate the whole lattice. Unit cell is a building block of a lattice. It is the smallest unit of cell.