The distillation technique most suited for separating glycerol from spent-lye in the soap industry is:
fractional distillation
steam distillation
distillation under reduced pressure
distillation under reduced pressure
C.
distillation under reduced pressure
Glycerol with high boiling point (290oC) can be separated from spent lye by distillation under reduced pressure. This process is used to purify liquids having very high boiling points. By this process, the liquid is made to boil at a lower temperature than its boiling point by lowering the pressure on its surface.
Which branched chain isomer of the hydrocarbon with molecular mass 72u gives only one isomer of mono substituted alkyl halide?
Tertiary butyl chloride
Neopentane
Isohexane
Isohexane
The IUPAC name of neopentane is
2-methylbutane
2, 2-dimethylpropane
2-methylpropane
2-methylpropane
Identify the compound that exhibits tautomerism
2-Butene
Lactic acid
2-Pentanone
2-Pentanone
Presence of nitrogen in which among the following compounds can not be detected by Lassaigne method?
Hydrazine
Aniline
p-toluidine
Picric acid
The electrophile, E⊕ attacks the benzene ring to generate the intermediate σ-complex. Of the following, which σ-complex is of lowest energy?
The hottest region of Bunsen flame shown in the figure below is:
region 2
region 3
region 4
region 4
Which one of the following is the correct statement?
Boric acid is a protonic acid
Beryllium exhibits coordination number of six
Chlorides of both beryllium and aluminium have bridged chloride structures in solid phase
Chlorides of both beryllium and aluminium have bridged chloride structures in solid phase
