ORGANIC CHEMISRTRY REVIEWER Flashcards
Chromatography is the process for identification, purification, and separation of components of a mixture based on the basis of
A. Difference in their boiling point
B. Difference in their melting point
C. Difference in their affinity for mobile and stationary phase
D. Difference in their solubility
C. Difference in their affinity for mobile and stationary phase
Chromatography involves two mutually
A. Immiscible phases
B. Miscible phases
C. Soluble phases
D. None of the mentioned
A. Immiscible phases
There is no need of support if packed into a column when the stationary phase is
A. Gas
B. Liquid
C. Solid
D. None of the mentioned
C. Solid
Which of the following is not stationary phase?
A. Liquid-liquid chromatography
B. Gas-liquid chromatography
C. Gas-solid chromatography
D. Solid-solid chromatography
D. Solid-solid chromatography
Liquid chromatography is a technique for separating
A. Ions that are not dissolved in a solvent
B. Ions that are dissolved in a solvent
C. Ions that are dissolved in a solute
D. All of the mentioned
B. Ions that are dissolved in a solvent
In exclusion chromatography, solute molecules are separated based on
A. Molecular geometry and size
B. Molecular composition
C. Molecular phase
D. Molecular formula
A. Molecular geometry and size
The gas-solid chromatography is _________ chromatography as per basic principle involved.
A. Exclusion
B. Ion-exchange
C. Adsorption
D. Absorption
C. Adsorption
A proper solvent that is passed through the column for elution so that separated components can be collected is called
A. Adsorbent
B. Buffer solution
C. Mobile phase
D. None of the mentioned
B. Buffer solution
The relative solubility of solute in both the phases determines the
A. Rate of movement of solvent
B. Rate of disappearance of solvent
C. Rate of movement of solute
D. Rate of disappearance of solute
C. Rate of movement of solute
If the mobile phase is gas, movement of solute
A. boiling point
B. melting point
C. solubility
D. volatility
D. volatility
Column chromatography is based on the principle of
A. ion-exchange
B. exclusion principle
C. differential adsorption
D. absorption
C. differential adsorption
Arrange the following compounds in order of their increasing adsorption tendencies
A. Cellulose»_space; starch»_space; calcium carbonate»_space; alumina
B. Cellulose»_space; starch»_space; alumina»_space; charcoal
C. Charcoal»_space; cellulose»_space; starch»_space; alumina
D. Calcium carbonate»_space; alumina»_space; starch»_space; Cellulose
A. Cellulose»_space; starch»_space; calcium carbonate»_space; alumina
What is the factor responsible for the separation in column chromatography?
A. Polarity solvent
B. Polarity differences between the solutes
C. Polarity indifferences between the solvent
D. Polarity indifferences between the solutes
B. Polarity differences between the solutes
Select the correct statement from the following options.
A. The lesser the polarity of solute, more strongly it will be adsorbed on a polar surface
B. The greater the polarity of solute, more weakly it will be adsorbed on a polar surface
C. The greater the polarity of solute, more strongly it will be adsorbed on a polar surface
D. All of the mentioned
C. The greater the polarity of solute, more strongly it will be adsorbed on a polar surface
The correct order of increasing strength of adsorption is
A. Alkanes»_space; Esters»_space; Aldehydes»_space; Phenols»_space; Ketones
B. Aldehydes»_space; Phenols»_space; Ketones»_space; Esters»_space; Alkanes
C. Aldehydes»_space; Ketones»_space; Esters»_space; Alkanes»_space; Phenols
D. Alkanes»_space; Esters»_space; Ketones»_space; Aldehydes»_space; Phenols
D. Alkanes»_space; Esters»_space; Ketones»_space; Aldehydes»_space; Phenols
The components of the mixture in column chromatography are eluted in order of
A. increasing polarity and decreasing distribution ratio
B. increasing polarity and increasing distribution ratio
C. decreasing polarity and increasing distribution ratio
D. decreasing polarity and decreasing distribution ratio
B. increasing polarity and increasing distribution ratio
The elution power of a solvent is determined by
A. its over polarity
B. the polarity of the stationary phase
C. the nature of the sample components
D. all of the mentioned
D. all of the mentioned
Which of the following is separated through column chromatography?
A. Chlorophyll and carotenoids
B. Inorganic cations or complexes
C. Sugar derivatives
D. Amino acids formed by hydrolysis of a protein molecule
A. Chlorophyll and carotenoids
The mixture of petroleum ether and benzene is used in the elution ratio of
A. 1:2
B. 1:5
C. 1:9
D. 1:12
C. 1:9
Chloroform fraction is eluted from the column by passing chloroform through the column which acts as
A. Eluter
B. Eluant
C. Elution
D. None of the mentioned
C. Elution
The principle on which thin layer chromatography is based is that the
A. Different compounds are absorbed on an absorbent to different degrees
B. Different compounds are absorbed on an absorbent to same degrees
C. Different compounds are adsorbed on an adsorbent to different degrees
D. Different compounds are absorbed on an absorbent to same degrees
C. Different compounds are adsorbed on an adsorbent to different degrees
The size of a thin layer of adsorbent is about
A. 0.1 mm
B. 0.2 mm
C. 0.3 mm
D. 0.4 mm
B. 0.2 mm
The Chroma plate or thin layer chromatography plate is made up of
A. Glass
B. Wood
C. Fibre
D. Metal
A. Glass
The eluant filled in the closed jar is
A. Mixture of gases
B. Mixture of a liquid and a gas
C. Mixture of solid
D. Mixture of liquids
D. Mixture of liquids