Adjective:

फ़ासफ़ोरस तत्त्व-संबंधी, फ़ास्फ़रोस,

phosphorous's Usage Examples:

phosphorous acid, the two hydrogen atoms in the -OH groups are acidic, but the other one isn't.

phosphorous, potassium, sodium, sulfur, chloride or fluoride.

Water gives hydrochloric and phosphorous acids, with separation of red phosphorus if the water be hot.

soc. chim., 99 (3), 21, p. 926; Matignon, Comptes rendus, 1900, 130, p. 1391); and by the reduction of phosphorous acid with nascent hydrogen.

Some time later Davy, by heating phosphorous acid, obtained a phosphoretted hydrogen which was not spontaneously inflammable.

The phosphorous haloids give the corresponding ethyl haloid.

phosphorous bomb was dropped by a stray plane.

Phosphorous acid, P(OH) 3, discovered by Davy in 1812, may be ' obtained by dissolving its anhydride, P 4 0 61 in cold water; by immersing sticks of phosphorus in a solution of copper sulphate contained in a well-closed flask, filtering from the copper sulphide and precipitating the sulphuric acid simultaneously formed by baryta water, and concentrating the solution in vacuo; or by passing chlorine into melted phosphorus covered with water, the first formed phosphorus trichloride being decomposed by the water into phosphorous and hydrochloric acids.

Both phosphoric and phosphorous acids became known, although imperfectly, towards the end of the 18th century; phosphorous acid was first obtained pure by Davy in 1812, while pure phosphorous oxide, the anhydride of phosphorous acid, remained unknown until T.

With water it gave phosphorous acid and a yellow indefinite solid.

Synonyms:

phosphoric,