general chemistry help high school

. At high altitudes like Ooty, having lower atmospheric pressure, water boils at a much lower temperature than in the plains like Bangalore where atmospheric pressure is higher. Generally, boiling points for most of the liquids are specified as normal boiling points. The normal ..

Characteristics of Covalent Compounds - 1) Covalent compounds consist of molecules and not ions. The molecules do not have any electric charge on them. The molecules are held together by weak forces called Van der Waal's forces . 2) Covalent compounds are either gases, volatile liquids or soft soli..

In chemisorption, the forces of attraction between the adsorbate and the adsorbent are very strong; the molecules of adsorbate form chemical bonds with the molecules of the adsorbent present in the surface. Adsorption is generally accompanied by release of energy, that is, most adsorptio..

. They are also known as inner transition elements. Their general electronic configuration is (n-2) f 1 - 1 4 (n-1)d 0 - 1 ns 2 . Ionization potential (I.P) is the energy required to remove the outermost electron from an isolated gaseous atom of an element. Ionization potential increases ..

,(except graphite and iodine which are lustrous nonmetals) Solids at room temperature(except mercury and gallium which are liquids) May be solids, liquids or gases at room temperature. Strong and tough and high tensile strength. (exceptions are zinc, mercury and gallium) Not strong. low t..

,(except graphite and iodine which are lustrous nonmetals) Solids at room temperature(except mercury and gallium which are liquids) May be solids, liquids or gases at room temperature. Strong and tough and high tensile strength. (exceptions are zinc, mercury and gallium) Not strong. low t..

Shape-selective catalysis are those reactions that depend on the pore structure of the catalyst and the size of the reactant and product molecules. In such reactions, zeolites are used as catalysts. Zeolites are microporous aluminosilicates of the general formula M x / n [(AlO 2 ) x (SiO ..

.5 kcal/mol more stable than ethylene (H h y d r o g = 30.3). Further, increasing the degree of substitution leads to further stability, and as a general rule alkenes follow this stability order:Tetrasubstituted>Trisubstituted>Disubstituted>Monosubstitut..

Silicones - Silicones are polymeric compounds containing Si-O-Si linkages. These have the general formula (R 2 SiO) n . These may be linear cyclic or cross-linked. These have very high thermal stability and are called high temperature polymers (R may be alkyl or phenyl..

Nature of C-X Bond - The general formula of Haloalkane (CnH 2 n + 1 - X) or Haloarene is 'RX' where R - is an alkyl or aryl group and X is a halogen atom (F, Cl, Br or I). The halogen derived hydrocarbons are a highly reactive class of compounds. The reactivity is due to the pre..