Your IP: 193.70.2.138 Process control is extensively used in industry and enables mass production of continuous processes such as oil refining, paper manufacturing, chemicals, power plants and many other industries. The Mond process is a method for refining nickel. Process control enables automation, with which a small staff of operating personnel can operate a complex process from a central control room." Gold processing - Gold processing - Refining: Gold extracted by amalgamation or cyanidation contains a variety of impurities, including zinc, copper, silver, and iron. • The kinds of energy used and the manner in which energy is used are discussed on a process-by-process basis. (ii) What is the role of Zn in the extraction of silver? In the United States, approximately 40 percent of used oil is captured and recycled in some manner, while 60 percent is lost. Click hereto get an answer to your question ️ (A) Give both chemical equation of 'Mond process' used in nickel refining(B) Draw a neat and labelled diagram of zone refining process Explain: (i) Zone refining     (ii) Column chromatography. The nickel oxide and impurities react with the hydrogen gas to form an impure solid nickel. The weakly adsorbed component is eluted first followed by the more strongly adsorbed and so on. Refining petroleum accounts for about 4 percent of the total energy consumed in the United States and about 15 percent of all industrial consumption. Nickel processing - Nickel processing - Extraction and refining: The extraction of nickel from ore follows much the same route as copper, and indeed, in a number of cases, similar processes and equipment are used. (i) Zone refining: The method is based on the principle that the impurities are more soluble in the melt than the pure metal. Ni(CO)4          Ni + 4CO(Nickel tetracarbonyl)    nickel. The latter when heated over a tungsten filament at 2075 K decomposes to give pure zirconium. Download the PDF Question Papers Free for off line practice and view the Solutions online. The method is especially suitale for such elements which are available only in minute quantities and the impurities are not very much different in their chemical behaviour from the element to be purified. The process is repeated several times and the heater is moved in the same direction. b) What is the role of Zn in the extraction of silver? In this process, nickel is heated in the presence of carbon monoxide to form nickel tetracarbonyl, which is a volatile complex. Ni(CO)4 Ni + 4CO(Nickel tetracarbonyl) nickel … Maths. Class 12 Class 11 Class 10 Class 9 Class 8 Class 7 … Delhi 2013) Answer: Zone refining: It is based on the principle that the impurities are more soluble in molten state than in the solid state of the metal. Once crude oil is extracted from the ground, it must be transported and refined into petroleum products that have any value. Electro-refining operations, where these anodes are dissolved electrolytically to produce pure nickel and copper and an anode slime containing the precious metals. Describe the principle involved in each of the following processes. NCERT DC Pandey Sunil Batra HC Verma Pradeep Errorless. Biology. 2015 Short Answer Type Questions [II] [3 Marks] Question 1. • is packed in a glass column. Name the processes from which chlorine is obtained as a bye-product. What will happen if an aqueous solution of NaCl is subjected to electrolysis? Cloudflare Ray ID: 615a2d374d2a4a5c It leaves the major metallic element in a practically pure state for commercial application. Physics. The higher temperature range, depend on the points of corresponding intersections in the ΔrG0 vs T plots. Then, the obtained nickel tetracarbonyl is decomposed by subjecting it to a higher temperature (450 - 470 K) … © Following are the reaction steps. (iii) Reduction of metal oxide to metal becomes easier if the metal obtained is in liquid state. Purification of nickel oxides to obtain the purest metal is performed via the Mond process, which increases the nickel concentrate to greater than 99.99% purity. (ii) Column chromatography is based on the principle that different components of a mixture are differently adsorbed on an adsorbent. (b) Mond’s process It is used for refining of nickel. This method is used for refining the metals having low-melting points, such as tin, lead, bismuth. The mixture to be separated or purified, taken in a suitable solvent, is applied on the top of the column. (ii) Column Chromatography: In column chromatography an adsorbent (e.g., Al. ) Nickel is refined by Mond's process. The process of crude oil refining. (i) Name the method of refining to obtain low boiling metal like mercury, … The stationary phase is immobile and immiscible example Silica gel(SiO2) , Alumina gel(Al2O3) . Chemical operations, for the separation and refining of the individual metals. . The latter when heated over a tungsten filament at 2075 K decomposes to give pure zirconium.Zr(impure) + 2I2(I2Vapour)   →870 K    ZnI4(vapour)    →Tungsten filament2075  Zrpure + 2I2. Two methods are commonly employed for purification: the Miller process and the Wohlwill process. Al2O3 column is usually used as the stationary phase in column chromatography. (ii) Zn is used as a reducing agent. Download PDF's . In this method oxygen and nitrogen, present as impurity are removed by heating metal in an evacuated vessel with iodine. Why? Mond's process is used for the purification of . Smelting operations, where the original matte is broken down to yield metallic nickel and copper anodes. But after a few days of taking many pictures, the battery dies. Refining of metals The metals prepared by different methods contain impurities. Silver is found embedded in several different minerals, namely copper, zinc and lead, and the refining process varies depending on the source. Question 19. This process was patented by L. Mond and has been in industrial use since before the beginning of the 20th century. Mond process for refining of Nickel is based on the principle that nickel is heated in the presence of carbon monoxide to form nickel tetracarbonyl, which is a volatile complex. Among the ores mentioned in table 6.1, the ores of iron such as haematite (Fe, https://www.zigya.com/share/Q0hFTjEyMTEwNTIw. (b) Van Arkel Process: Zirconium (or titanium) is heated in iodine vapour at about 870 K to form volatile Znl. Performance & security by Cloudflare, Please complete the security check to access. 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