Chemistry

Potassium dichromate is an important chemical used in industries as an oxidizing agent and for the preparation of many other compounds. It occurs naturally in…

Properties of Copper Sulphate (CuSO4.5H2O) Physical properties The anhydrous salt is colourless but the hydrated salt is blue in colour. It readily dissolves in water…

Laboratory Preparation of Copper Sulphate (Blue Vitriol): In laboratory it is prepared by dissolving cupric oxide (or) cupric hydroxide (or) cupric carbonate in dilute H2SO4…

Potassium Dichromate is used for the Chromyl chloride test. Potassium dichromate is used for preparing strong cleaning solutions for glassware and for etching materials. When…

All transition elements are d-block elements, but all d-block elements do not transition elements. D block elements are chemical elements having electrons filling to their…

Although Alcohols (C2H5 — OH) are covalent compounds but they are soluble in water. Covalent compounds are generally insoluble in water. But some organic compounds…

Electrolytic refining Electrolytic refining method is used when very pure gold is required. The impure gold is made the anode while a thin sheet of pure…

Properties of Gold: Physical properties i) Gold is a lustrous yellow metal which melts at 1063°C to a green liquid and boils at 2610°C. ii)…

The extraction of gold from the sulphide or telluride ore involves the following steps : i) Crushing, grinding and concentration The gold ore is crushed…

Occurrence Gold is mainly found in the native state either mixed with quartz in ancient rocks (vein gold) or scattered in sand and gravel (placer…