Tag: world energy needs

50% benzol or 90% Toluol is named so because 50% of it distills upto 100 deg C and 90% of it distills between 110-140 deg C. 50% benzol or 90% Toluol consists mainly of xylenes and small amounts of benzene and toluene.

Benzene, toluene and xylene, obtained during fractional distillation of 50% benzol or 90% Toluol are used as solvents. They are also used in dry cleaning, as fuel and for preparing dyes, drugs, explosives etc.

All of the following statements are true.
When carbolic oil is cooled, naphthalene crystallizes out.
Naphthalene is purified by sublimation.
Naphthalene is used for manufacture of dyes, drugs, explosives etc.

The percent of xylene present in 90% benzol is 3-5%.

solvent naphtha or benzin is used as a solvent for paints, resins, rubber etc.

Light oil or crude naphtha contains pyridine.
Whereas middle oil or carbolic oil contains phenol and naphthalene and green oil contains anthracene.

Anthracene oil shows green fluorescence. Hence, it is also named green oil.

All of the given statements are true regarding creosote oil.
It contains cresols along with some naphthalene and quinoline.
It is not worked up because its constituents are more easily obtained by synthetic methods.
It is used as such under the name of creosote oil for the preservation of wood and for the manufacture of some disinfectants.

Green oil contains anthracene that is used for the manufacture of alizarin dyes.

 Pitch or undistilled residue is used in varnishes, road-making and protecting wood and metal work