state of the science paper

Colloidal solution or colloidal state or colloidal dispersion, represent an intermediate kind of a mixture between true solution and suspension. The size of a colloidal particle lies roughly between 1-100 nm. Colloids are also a two-phase heterogeneous system consisting of the dispersed p..

Question: State and verify Snell's law. Answer: Snell's law states that for any two given pair of media, the ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant. Place a rectangular glass slab on white sheet of paper..

Very few metals exist in the free or native state. Only metals like gold, platinum and mercury are occasionally found in the free state i.e., in the pure form. Sometimes, copper and silver may also be found in the free state. Such metals are not acted upon by air or w..

The rest of the metals occur in the combined form as compounds such as oxides, carbonates, sulphides, sulphates, silicates, chlorides, nitrates, phosphates etc. Copper and silver are two metals which occur in free as well as combined state as sulphide, oxide or halide ores. Metals at the..

In solids, atoms or molecules are closely packed and the intermolecular space or void is minimum. The average distance between particles is of the order 10 -8 cm; consequently, solids are almost incompressible. In addition, the intermolecular attraction in solids is quite high and for that reason t..

Depending on the conditions of temperature and pressure, matter can exist in any of the three main states i.e., solid, liquid or gas. Matter can be inter-converted from one state to the other by the addition or removal of heat energ..

Depending on the conditions of temperature and pressure, matter can exist in any of the three main states i.e., solid, liquid or gas. Matter can be inter-converted from one state to the other by the addition or removal of heat energy. All the three states of matter ar..

Colloidal particles do not pass through ultrafilter papers, animal and vegetable membranes. The large pore size of ordinary filter paper enables colloidal particles to pass through. If ordinary filter paper is suitably impregnated with collodion, the size of the pores ..

Chemical Reactions and Equations - A physical change is one in which the shape, size, appearance or state, of a substance may alter, but its chemical composition remains same.A change in which the composition of a substance is altered is called as chemical chang..

Practically all industries use acids or bases in one process or the other. Major industries, which employ these are, Paper, Dyes, Ink, Paints and Drugs industrie..