23.05.18 (CGPCS) Chhattisgarh Current Affairs

CHHATTISGARH Every sector of c’garh developed in last 14 years: cm   Chief Minister Raman Singh on Tuesday said that in last 14 years, every sector of the State has undergone development and there has been a positive change in Read More …

Basic Knowledge of Computers

Classifications, generations, applications and limitations of digital computers   Computer Classification: By Size and Power Computers differ based on their data processing abilities. They are classified according to purpose, data handling and functionality. According to functionality, computers are classified as: Analog Computer: A computer that 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 Read More …

Preparation of nitrogen

  Preparation of nitrogen Nitrogen is found in both free and combined states. It occupies 78.07% by volume. Nitrogen can be prepared: By heating copper in air: Firstly, air is passed through lime water and then concentrated sulphuric acid to Read More …

Minerals

Minerals Minerals are defined as solid, inorganic, naturally occurring substances with a definite chemical formula and general structure. Almost all chemical elements in the Earth’s crust are associated with at least one mineral. They vary in color, hardness, density, crystal Read More …

Metallurgy of Copper

  Metallurgy of Copper Copper Mining: The commonest ore used in the extraction of copper is Chalcopyrite (CuFeS2) also known as Copper Pyrites and other such sulfides. The percentage of copper in the actual ore is too low for direct extraction of 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. 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. Read More …

laboratory method of preparing alcohol

Laboratory method of preparing alcohol Hydrolysis of Alkyl Halides This is a nucleophilic  substitution reaction. R-X + KOHaq → R-OH The method is not satisfactory as olefins are also formed as by-products. However better yields is obtained by using moist Ag2O or Read More …