How is elemental silicon obtained by aluminothermy method? Explain with the reaction equation.

Q: The hydration reaction involving dicalcium silicate is as follows: 2CaO-SiO2 + 3H2O = 2CaO-SiO2-3H2O…

A: Given : Mass of 2CaO-SiO2-3H2O to be produced = 3000 Kg = 3 X 106 g…

Q: Explain the observed properties of Corundum (-Alumina) based on the features of its crystal…

A:

Q: Mention who discovered Boron and how, as well as the general properties of the Boron family group.

A: Boron was discovered by Joseph-Louis Gay-Lussac and Louis-Jaques Thénard, French chemists, and…

Q: Why does silicon form only single bonds with oxygen but carbon, which is in the same family as…

A: Carbon atom is smaller than the silicon atom. Both carbon and silicon comes under the same group but…

Q: general background of aluminium.

A: There are in total 118 elements in chemistry. Aluminium is one of them which is very useful in our…

Q: What is Bakelite? How is it formed? Include equations if possible

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Q: What is the difference between iron and steel? What is the difference between wrought iron and cast…

A: In the earth's crust metals occur both in combined state in the form of minerals as well as in the…

Q: Why does Copper oxide turns red when reduced? What material is responsible for this?

A: In any chemical reaction, if number of electron is increasing of individual atom or molecule then…

Q: Elemental boron is produced by reduction of boron oxide with magnesium to give boron and magnesium…

A: The balanced chemical equation for reduction of boron oxide with magnesium to give boron and…

Q: Discuss the following sentences: 1- In alumina manufacturing, calcination process is preferred…

A: Discussing the following statements.

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: elaborate the process of metallurgy

A: Metallurgy is the process of extraction of metals.

Q: What safety precautions should be taken with selenium? I am preparing to remove selium from water…

A: Selenium is an essential metal for human and other animals, but taking higher doses can be harmful.

Q: a. What is metallurgy? b. Describe the three methods of concentrating CE DEPT US

A:

Q: Calcination, roasting, and smelting are three pyrometallurgical processes. Compare and contrast the…

A: Calcination is a pyrometallurgical process of heating ore in the absence of air or limited supply of…

Q: Chromium metal is obtained by reduction of chromium(III) oxide with powdered aluminum. The reaction…

A: Write the balanced equation for this reduction reaction--

Q: Describe the chemical reactions of lanthanides in detail?

A: Lanthanides (Ln): The elements that exist at the bottom of the periodic table that is from atomic…

Q: What is white phosphorus?

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Q: what is common oxidation state of lanthanides? and why ?

A: The general electronic configuration of lanthanides is [Xe]4fn5d0-16s2.Lanthanides have incomplete…

Q: Give reasons, why copper is used to make hot water tanks and not steel (an alloy of iron)

A: Copper is used to make hot water tanks. Steel reacts with steam.

Q: Explain the process of standardizing solution of silver nitrate using hydrochloric acid.

A: We need to standardize a solution of silver nitrate using hydrochloric acid. For this, we are…

Q: Which gases are used as shielding gases in tig welding?

A: Given,  Which gases are used as shielding gases in tig welding = ?

Q: Does metallic tin react with HCl?

A: The metals react with acids to form salt and liberate hydrogen gas. Tin (Sn) is a group 14 element…

Q: Write balanced chemical equations for the following reactions: (a) cadmium burned in air…

A:

Q: write a summary on Production of inorganic light-harvesting materials for solar cells and then also…

A: As the name suggests, light-harvesting materials harvest solar or sun energy that is converted to…

Q: Write defect reactions for FeO and NiO. What oxide would form from each of the defect reactions?

A: Solid defects are of three types: 1. Stoichiometric defects 2. Non-stoichiometric defects 3.…

Q: Aluminum is the most abundant metal in the earth's crust. It is also a common household utensi…

A: A physical change is observed when matter changes its form/ phase but the chemical identity of the…

Q: What is the difference between substituted aluminum in silicates and adding sodium as modifier in…

A: Interpretation-  To tell about the difference between substituted aluminum in silicates and adding…

Q: Why are the lanthanoid elements not found in nature in their elemental forms?

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Q: Investingate and report the uses of ferromagnetic oxides in magnetic recording tapes

A: Recording tapes have a thin plastic base material and this base have a coating of ferric oxide…

Q: (i) Indicate the principle behind the method used for the refining of zinc.(ii) What is the role of…

A: The process of extraction of metals ( in pure form) from minerals is termed metallurgy. Minerals may…

Q: what is lanthanide contraction?

A: The elements having atomic number 57 that corresponds to lanthanum to atomic number 71 that…

Q: What is Lanthanoid contraction? What are its two consequences?

A: Lanthanoid contraction: A regular decrease in the size of Lanthanide ion due to increases in nuclear…

Q: Define the term silicates?

A: Silicates are the compounds of Si and O.

Q: What is the common ore of tin and how is tin separated from it?

A: Tin is a malleable metal which isn't oxidized in air easily.

Q: What is added to molten iron to make steel? * O A small amounts of carbon B limestone and coke C…

A: Blast furnace is a large cylindrical object made up of the heated bricks which is used for the steel…

Q: Although thermodynamically feasible, in practice, magnesium metal is not used for reduction of…

A: The objective of the question is to explain the reason that although thermodynamically feasible in…

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

A:

Q: Write the five balanced reactions of the copper cycle, including phase symbols. Number them 1…

A: Copper cycle involves five reactions.In the first reaction, copper metal is oxidized by nitric acid…

Group 15 elements

The elements of group 15 are phosphorus, nitrogen, bismuth antimony, and arsenic. The most abundant element which is present in the air is nitrogen and the percentage of nitrogen present in the air is 78%. In the free state, the elemental nitrogen is present as diatomic gas (N2). In the organic matter obtained from plants and animals, phosphorus is the dominant element present. In nucleic acids, phosphate groups are present. Phosphates are also found in teeth and bones. The other elements arsenic, bismuth, and antimony are found as sulfides. Arsenopyrite, bismuth glance, and stibnite are examples of sulfides of arsenic, bismuth, and antimony respectively.