zinc

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

Some important chemcial compounds – properties and uses.

Compounds are defined as substances composed of two or more different elements that are chemically combined. Both salt and water are compounds. Some important chemical compound and their uses are as follows:- NaCl sodium chloride (table salt, used in solutions for contact lens) ZnO zinc oxide (used in some sunscreens and diaper rash ointment) NaF sodium fluoride (active ingredient in toothpaste) SeS selenium sulfide (in selsium blue shampoo) NaNO2 sodium nitrite (preservation in meat such as bacon) NaClO sodium hypochlorite (bleach) N2O dinitrogen oxide (laughing gas used for some dental work) Baking powder NaHCO3; sodium bicarbonate Used for baking for ... 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

Ore

Ore An ore is a special type of rock that contains a large enough amount of a particular mineral (usually a metal) to make it economically practical to extract that mineral from the surrounding rock. Not all minerals are found in a large enough amount in one location to make it worth it to remove the ore from the rock through a process known as mining. Ores can be mined in a number of ways, including strip mining as shown here at this uranium mine. If there is a large enough amount present, the rock will be extracted and processed in a ... Read more

Metallurgy concentration, roasting, smelting

Metallurgy concentration, roasting, smelting Roasting It is a process wherein the ore is heated either alone or with some other material in excess of air below the fusion point of the ore. Usually, this method is used for sulphide ores. In roasting, definite chemical changes take place to form oxide or chloride of the metal. Ores of metals like zinc, lead, copper and nickel, when roasted in air, are converted to their oxides. Ores of some metals like lead may get partially oxidized and converted to sulphate. In such case, it is called sulphating roasting or partial roasting. Ores of ... Read more