Chemistry ORES AND METALLURGY 1. Metals occur in nature some times free but mostly in combined sate. 2.The minerals from which the metals can be conveniently and economically extracted are know as ores. 3.All the ores can be minerals but all minerals can’t be ores. 4. Metals which are least reactive and have little affinity … Read more
Chemistry Important Ores of Metals Name of Elements 1- Iron (Fe) Ores: Hematite: Fe2O3 Magnetite: Fe3O4 IronPyrite: FeS2 Siderite: FeCO3 2- Aluminum (Al) Ores: Bauxite: Al2O32H2O Corundum: Al2O3 Kryolite: Na3AlF6 3-Zinc (Zn) Ores: Zinc Blende: ZnS Calamine: ZnCo3 4- Copper (Cu) Ores: Copper Pyrite: CuFeS2 Copper Glance: Cu2S Malachite: … Read more
Chemistry 1- Hydrogen gas is released when a metal reacts with an acid . 2- Lime water turns milky when carbon dioxide is passed due to the formation of CaCO3 3-Acids react with metal carbonates to liberate Carbon dioxide gas. 4- You have been provided with three test tubes. One of them contains … Read more
Chemistry Ions and salts 1-An ion is a charged species, an atom or a molecule, that has lost or gained one or more electrons. 2-When an atom loses an electron and thus has more protons than electrons, the atom is a positively charged ion or cation. 3-When an atom gains an electron and … Read more
Atoms -Important Properties-Important One Liners 1-An atom is the smallest constituent unit of ordinary matter that has the properties of a chemical element. 2-Every atom is composed of a nucleus and one or more electrons bound to the nucleus. 3-Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. 4-The … Read more
Chemistry -One Liners 1-Action of phosphoric acid on rock phosphate produces phosphoric acid 2-What is the name given to the electrons in the highest occupied energy level of an atom ? -Ans- valence electrons 3-What type of bonding does NaCl have ? -Ionic 4-Temperature and pressure in ammonia converter is 450 atm, 550°C 5-Fusion zone … Read more
Chemistry -One Liners -Important Points 1- Silver Iodide is the Chemical used for cloud seeding for artificial rains. 2- Laughing gas is ‘Nitrous Oxide’ 3-The Chemical used in developing photographic films is Silver Bromide 4-The Process by which milk converted into curd is called Fermentation 5-Graphite is used as a Moderator in nuclear reactor 6-During … Read more
Common Names of Chemical Compounds Common Names – Chemical Compounds Bleaching Powder -Calcium Oxychloride Baking Powder -Sodium Bicarbonate Blue Vitriol -Copper Sulphate Chalk (Marble) – Calcium Carbonate Chloroform -Trichloro Methane Caustic Soda -Sodium Hydroxide Caustic Potash – Potassium Hydroxide Dry Ice -Solid Carbondioxide Green Vitriol – Ferrous Sulphate Epsom – Magnesium Sulphate Gypsum – Calcium … Read more
Amino Acids – Proteins 1-Amino acids are organic compounds containing an amino group [NH2] and an acidic group [COOH] as substituents on the same carbon i.e., the a-carbon. Hence, they are called a-amino acids. 2-Amino acids contain amino (–NH2) and carboxyl (–COOH) functional groups. 3-Amino acids are classified as acidic, basic or … Read more
Chemistry Glossary 1- Acid – Compound that gives off H+ ions in solution. 2-Base – Substance which gives off hydroxide ions (OH-) in solution. 3-Catalyst – Substance that speeds up a chemical process without actually changing the products of reaction. 4-Density – Mass per unit volume of a substance. 5-Effusion – Movement of gas molecules … Read more