Which technique is used to separate a mixture of liquids based on their boiling points?
Filtration
Chromatography
Distillation
Crystallization
Related Questions
The sodium extract of an organic compound on acidification with acetic acid and addition of lead acetate solution gives a black precipitate. The organic compound contains
Nitrogen
Halogen
Sulphur
Phosphorus
Which of the following is NOT a suitable method for determining the concentration of a sodium hydroxide solution?
Titration with a standard hydrochloric acid solution
Titration with potassium hydrogen phthalate (KHP)
Conductometry using a calibrated conductivity meter
Titration with sodium carbonate
A chemist wants to determine the nitrogen content of a protein sample. Which method would be suitable for this purpose?
Dumas method
Kjeldahl's method
Liebig's method
Carius method
In the estimation of nitrogen by Duma’s method 0.59 g of an organic compound gave 112 mL nitrogen at NTP. The percentage of nitrogen in the compound is about:
Molecular mass of a volatile substances may be obtained by
Beilstein method
Lassaigne method
Victor Mayer's method
Leibig's method
Detection of phosphorus in the compound can be done by its conversion into phosphate. Reagent to identify phosphate ion is
Sodium nitroprusside
Ammonium molybdate
Potassium ferrocyanide
Potassium ferricyanide
Nitrogen containing organic compound when fused with sodium forms
Sodium azide
Sodium cyanide
Sodamide
Sodium cyanate
An organic compound having carbon, hydrogen and sulphur contains 4% of sulphur. The minimum molecular weight of the compound is
500
800
400
100
An organic compound has carbon and hydrogen percentage in the ratio 6:1 and carbon and oxygen percentages in the ratio 3:4. The compound has the empirical formula
