Select topics and difficulty and just practice mcqs.
Purification Of Organic Compounds
User (name or email)
pick difficulty level
number of questions
Let's practice 30 mcqs on
Purification Of Organic Compounds
mcqs by everyone
In steam distillation, the sum of the vapour pressure of the volatile compound and that of water is
exactly half of the atmospheric pressure.
equal to atmospheric pressure
less than atmospheric pressure
more than atmospheric pressure
A mixture of o-hydroxyacetophenone and hydroxyacetophenone can be separated by
An organic compound having carbon, hydrogen and sulphur contains 4% ofsulphur.
The minimum molecular mass of the compound is
The molecular mass of an organic compound which contains only one nitrogen atom can be
The chloroplatinate of an organic base contains 39% of Pt. The equivalent mass of the base is
The formation of violet colour when sodium nitroprusside is added to sodium extract indicates the presence of
The separation an organic compound from it s aqueous solution can be achieved by
A mixture of acetone and methanol can be separated by
Naphthalene can be purified by
Extraction with a solvent
The boiling point of a compound does not depend upon
Polarity of the molecule.
Solubility of the compound in water
Size of molecules
The purification of benzeneamine is done by
By adding oxalic acid.
In paper chromatography,
both phases are solids.
the mobile phase is a liquid and the stationary phase is a solid
the mobile phase is a solid and the stationary phase is a liquid
both phases are liquids
The Beilsteins test is a rapid test used for organic compounds to detect
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
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.
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
A mixture of benzoic acid and naphthalene can be separated by crystallization from
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
Sugar containing an impurity of common salt can be purified by crystallization from
Sublimation cannot be used for purification of
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
In Lassaignes test, the organic compound is fused with a piece of sodium metal in order to
increase the reactivity of the compound
increase the ionization of the compound
convert the covert the covalent compound into a mixture of ionic compounds.
decrease the melting point of the compound
Separation of two substances by fractional crystallisation depends upon their difference in
The separation of the constituents of a mixture by column chromatography depends upon their
Different boiling points
Different refractive indices
When a solid vapourize directly without melting, the process is called
The technique of gas chromatography is suitable for compounds which
are soluble in water
have very low boiling points
vapourize without decomposition.
A compound which does not give a positive test in the Lassaignes test for nitrogen is
Which of the following element s in an organic compound cannot be detected by Lassaignes test
By decreasing the pressure, the boiling point of a liquid
May increases or decrease.
we serve best when javscript is enabled