Why metals like potassium and sodium can not be extracted by reduction of their oxides by carbon?

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: What class of element is obtained by oxidation of a mineral? What class of element is obtained by…

A:

Q: Why do Selenium and tellurium occur in rare minerals?

A: The reason why Selenium and tellurium occur in rare minerals has to be given,

Q: >Why does BN form compounds similar to those formed by elemental carbon?

A: The boron nitride consists of BN units, which have same number of electrons (isoelectronic) as that…

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: Explain why iron and manganese exist in the lower oxidation states at the bottom of large eutrophic…

A:

Q: Write a balanced equation to show the reaction between magnesium metal and aluminum chloride. What…

A: Write the balanced equation to show the reaction between magnesium metal and aluminum chloride. What…

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: MnO−4 reacts with Fe2+ in acid solution to produce Fe3+ and Mn2+.  Write a balanced equation for…

A: Explanation: Equation involves OXIDATION & REDUCTION reactions Ferrous ion is oxidized…

Q: What chemical process is used for obtaining a metal from its oxide?

A: The chemical process used for obtaining metal from its oxide:

Q: During the refining of iron, carbon must be present in the blast furnace. Why is carbon necessary to…

A:

Q: Upon oxidation, calcium (Ca) compounds give

A: The answer is option ( A) Brick red color

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

A:

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: Why can some metals not be extracted by heating with carbon?

A: Reactivity series determines the extraction of metal by heating with carbon.

Q: Write equation for the reaction of: (i) Iron with steam(ii) Calcium and potassium with water

A:

Q: Explain the different production process of advanced materials like carbon filter, ceramics, and…

A: The different production processes of advanced materials like a carbon filter, ceramics, and micro…

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

A: Aluminium is generally extracted from bauxite ore.

Q: Explain the role of each of the following in the extraction of metals from their ores :(i) CO in the…

A: Extraction of metals: Extractive metallurgy is the practice of removing valuable metals from an ore…

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: What class of element is obtained by oxidation of a mineral?What class of element is obtained by…

A:

Q: What are the clinical uses of iron preparations? Explain the use of sulfuric acid in the analysis?

A: We have to describe the clinical uses of iron preparations and also explain the use of sulfuric…

Q: Write the role of the following: (i) Iodine in the refining of zirconium (ii) Silica in the…

A: i) When impure zirconium is heated with the iodine, it will form volatile compound ZrI4, which on…

Q: Magnesium is obtained by electrolysis of molten MgCl2. (a) Why is an aqueous solution of MgCl2 not…

A: Electrochemistry gives the relation between electrical energy and chemical changes associated with…

Q: Why is it important to know the reactions of alkali and alkaline metals in metallurgical processes?

A: Alkali metals are group 1 elements like potassium, sodium, Lithium, cesium, rubidium etc. Alkaline…

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

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

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: How sodium is used for extraction of silicon and boron?

A: Extraction of silicon:Silicon dioxide is extracted from waste colored glasses by alkali using sodium…

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: Calsium carbide lamps were earlier used in mines. Write the reaction equation for the working of…

A: Answer:

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

A:

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: Why is vanadium present in oil from some sources?

A: Vanadium is an element having atomic number 23. The atomic symbol of vanadium is V. It is a…

Q: What is the chemical reaction between Titanium and Oxygen that makes them Titanium Dioxide?

A: The general method of production of titanium dioxide (TiO2) does not follow reaction of titanium and…

Q: aluminium is most abundant in earth crust yet it is obtained from bauxite. why?

A: Though Aluminum is the most abundant in earth crust it is obtained from bauxite. Bauxite (ore) is…

Q: Write a balanced half-reaction describing the reduction of aqueous magnesium cations to solid…

A: Answer is given below

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.