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Purification Of Organic Compounds
Relational Algebra DBMS
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Purification Of Organic Compounds
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0.59 g of the silver salt of an organic acid (mol.
Mass 210) on ignition gave 0.36 of puresilver.
The basicity of the acid is
When a solid vapourize directly without melting, the process is called
The separation of the constituents of a mixture by column chromatography depends upon their
Different refractive indices
Different boiling points
An organic compound having carbon, hydrogen and sulphur contains 4% ofsulphur.
The minimum molecular mass of the compound is
The technique of gas chromatography is suitable for compounds which
have very low boiling points
vapourize without decomposition.
are soluble in water
A mixture of camphor and benzoic acid can be separated by which of the following technique
Extraction with a solvent.
Refining of petroleum involves the process of
Distillation under reduced pressure.
Which of the following element s in an organic compound cannot be detected by Lassaignes test
Sublimation cannot be used for purification of
The Beilsteins test is a rapid test used for organic compounds to detect
A compound which does not give a positive test in the Lassaignes test for nitrogen is
In steam distillation, the sum of the vapour pressure of the volatile compound and that of water is
equal to atmospheric pressure
less than atmospheric pressure
more than atmospheric pressure
exactly half of the atmospheric pressure.
The molecular mass of an organic compound which contains only one nitrogen atom can be
The separation an organic compound from it s aqueous solution can be achieved by
The purification of benzeneamine is done by
By adding oxalic acid.
Naphthalene can be purified by
Extraction with a solvent
By decreasing the pressure, the boiling point of a liquid
May increases or decrease.
In Lassaignes test, the organic compound is fused with a piece of sodium metal in order to
increase the ionization of the compound
convert the covert the covalent compound into a mixture of ionic compounds.
increase the reactivity of the compound
decrease the melting point of the compound
In paper chromatography,
the mobile phase is a solid and the stationary phase is a liquid
both phases are liquids
the mobile phase is a liquid and the stationary phase is a solid
both phases are solids.
Chromatographic technique was introduced by
A mixture of o-hydroxyacetophenone and hydroxyacetophenone can be separated by
The chloroplatinate of an organic base contains 39% of Pt. The equivalent mass of the base is
Sugar containing an impurity of common salt can be purified by crystallization from
The boiling point of a compound does not depend upon
Polarity of the molecule.
Size of molecules
Solubility of the compound in water
Certain organic compound contains 10% of sulphur is it. Which of the following represent the minimum molecular mass of the compound
Separation of two substances by fractional crystallisation depends upon their difference in
0.532 g of the chloroplatinate of an organic base (mol.
Mass 264) gave 0.195 g Pt onignition.
Then the number of nitrogen atoms per molecule of the base is
Haemoglobin contains 0.33% of iron bymass.
The molecular mass of haemoglobin is approximately67200.
The number of iron atoms [at. mass Fe = 56] present is one molecule of haemoglobin is
Steam distillation is used for the extraction of
0.1914g of a monobasic organic acid is dissolved in about 20 mL of water 25 mL of 0.12 M NaOH is required for complete neutralization of the acidsolution.
The molar mass of the acid is
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