manganese

12.06.18 (CGPCS) Chhattisgarh Current Affairs

CHHATTISGARH   C’garh only state to distribute rs 700 cr bonus to tendupatta collectors’   Chief Minister Raman Singh inaugurated and performed bhumi-pujan of 21 development works worth nearly Rs 100 crore in the public meeting held at playground of Government Higher Secondary School Hringirishi in the district.   This includes extension work of 22-km long Nagri distributary of Sondhur canal till Dugli and renewal work of 61-km long road from Dhamtari to Nagri worth Rs 60.53 crore.   The Chief Minister said that he had sanctioned canal related demand of people during Lok Suraaj campaign, and now he is ... Read more

03.02.18 Chhattisgarh (CGPCS) Current Affairs

CHHATTISGARH Raman invites herbal majors to set up mfg units in c’garh   Chief Minister Raman Singh on Saturday invited reputed herbal products manufacturers of the country to set up units for production of herbal medicines in Chhattisgarh.   He was addressing the inaugural programme of two-day national symposium on ‘Vanoshadhi Chhattisgarh 2018″ based on herbal medicines here.   On the occasion, Singh released souvenir published by Chhattisgarh State Medicinal Plant Board.   The Chief Minister informed the herbal medicine manufacturing companies attending the symposium about the scope of farming, production and market for herbal medicines in Chhattisgarh.   He ... Read more

Preparation of Oxygen

Preparation of Oxygen Oxygen is prepared in lab generally in two ways either by the application of heat or no application of heat. Using heat: Oxygen in lab is prepared by heating the mixture of powdered potassium chlorate and manganese dioxide in the ratio 4:1 in a hard glass test tube. The oxygen gas is observed in a gas jar through the downward displacement of water. The reaction involved is given below: 2KClO3−→−−−−−MnO2200−300∘C2KCl+3O2↑ Without heat:  The dry sodium peroxide is taken in a conical flask and the apparatus is fitted as shown in figure. The two necks of woulfe’s bottle ... Read more

Refining of ores Metallurgy

 Refining of ores Metallurgy Metallurgy Metallurgy is the process of obtaining metals from ores. It may be defined as the processes which are involved in the extraction of metals from their ores and then refining them for use are known as metallurgy. Steps of Metallurgy: Metals can be extracted from their ores by following processes: Enrichment of ore or Concentration of Ore Conversion of concentrated ore into metal oxide Reduction of metal Oxide to metal Purification or Refining of Impure metal   ENRICHMENT OF ORE OR CONCENTRATION OF ORE   Before extracting the metal from an ore, it is necessary to remove ... Read more

Alloy

Alloy You might see the word alloy described as a “mixture of metals”, but that’s a little bit misleading because some alloys contain only one metal and it’s mixed in with other substances that are nonmetals (cast iron, for example, is an alloy made of just one metal, iron, mixed with one nonmetal, carbon). The best way to think of an alloy is as a material that’s made up of at least two different chemical elements, one of which is a metal. The other components of an alloy (which are called alloying agents) can be either metals or nonmetals and they’re ... Read more