about physics

1. Science. Science means "to know". It is a systematic way of acquiring knowledge about the surroundings by careful observations and experimentations over a period of time. 2. Physics. Study of nature and natural phenomena, put in an organised way in various subtopics is called..

The equilibrium established between two physical forms of a chemical substance, is called physical equilibrium, viz. change of water into vapour at normal temperature in a closed vessel. Water and vapour are same as chemical substance but their physical forms are liq..

Consider water kept in a closed vessel at a given temperature. Water in the vessel will evaporate with time and form water vapour. Concentration of water vapour over water surface will increase gradually. After some time, the molecules of vapour will be transformed into water due to mutual attrac..

1. Physical state : Pure acetic acid is a colourless liquid. 2. Odour : Characteristic pungent smell. 3. 3oiling point: It boils at 118C...

1) The boiling points of haloalkanes are in the order RF < RC1 < RBr < RI, The change in physical state is due to increase in van der Waal's forces between the molecules. These forces increase with increase in molecular mass. 2) Among the isomeric alkyl halides, the bo..

Physical Properties 1. Sulphur is a pale yellow solid. 2. It exists in different allotropic forms. 3. It is insoluble in water but soluble in carbon disulphide. 4. It melts at 114 C and boils at 444C 5. It does not conduct heat or electricity. Sulphur exists in t..

The word 'atom' derived from Greek word which literal!y means indivisible. This simple picture of 'atom' underwent significant modification later on In 1803 'Dalton' put forward his atomic theory according to which 'atom' was indiv isiuio tral particle. But 'Dalton's' model of atom could not..