common chemical compounds

Summary - In a physical change the shape, size, appearance or state of a substance may alter, but it is a temporary change, which is usually reversible. There is no new substance formed, no change in the mass of the substance and no energy changes are involved. In a chemical change, new s..

In a chemical reaction there is a rearrangement of particles. This rearrangement of particles, results in drastic changes in the properties of the substances. For e.g., sodium and chlorine are very reactive elements. When they combine, an electron is shifted from the sodium atom to the ch..

A palmately compound leaf is one in which all the leaflets arise from a common point at the tip of the petiole. Depending upon the number of leaflets present, the palmately compound leaves can be distinguished into the following typ..

A palmately compound leaf is one in which all the leaflets arise from a common point at the tip of the petiol..

Oxygen (dioxygen) is neutral and has no action towards blue or red litmus. It is a supporter of combustion. Oxygen is quite a stable compound due to high bond (dissociation) energy of O = O bond. Its bond energy is 495 kJ mol - 1 . So,..

Oxidizing Properties - Nitric acid is a strong oxidizing agent. When it undergoes thermal decomposition, it yields nascent oxygen as follow..

Pesticides, detergents, chemical dyes and other industrial chemicals and their waste constitute synthetic organic compounds. When present in water, these chemicals can act as toxic poisons for plants, animals and humans. Such chemicals enter the hy..

Energy changes in chemical reactions can also take place in forms other than heat, such as light, electricity, mechanical energy, etc. Some common examples are: The burning of petrol or diesel in motor engines of cars, trucks, tractors or buses produces mechanical energy, whi..

Some important group trends are: (a) On account of high ionization enthalpies, simple M 4 + ions of the group are not known. (b) Unlike carbon the other elements of the group form compounds having coordination numbers higher than 4 like (SiF 5 ) - , (SiF 6 ) 2 - and (PbCl 6 ) 2 - . (c) In..

Rate of Chemical Reactions - Everyday experience tells us that chemical reactions take place in widely varying rates. Infact rates of various reactions vary from very slow to very fast. Some reactions are so rapid that they occur as soon as the reactants are mixed. For example, ..