In Chromatography the retardation factor R f are used for identification of components. A high R f and a low R t (retention time) mean the component has a

greater affinity to the mobile phase in both TLC and HPLC

greater affinity to the stationary phase in both TLC and HPLC.

greater affinity to the stationary phase in TLC but a greater affinity for the mobile phase in HPLC

greater affinity to the mobile phase in TLC but a greater affininty for the stationary phase in HPLC

In Chromatography the retardation factor R f is used for identification of components. A low R f and a high R t (retention time) mean the component has a

greater affinity to the stationary phase in both TLC and HPLC.

greater affinity to the stationary phase in TLC but a greater affinity for the mobile phase in HPLC

greater affinity to the mobile phase in TLC but a greater affininty for the stationary phase in HPLC

greater affinity to the mobile phase in both TLC and HPLC

In Chromatography the retardation factor R f are used for identification of components. A low R f and a low R t (retention time) mean the component has a

greater affinity to the stationary phase in TLC but a greater affinity for the mobile phase in HPLC

greater affinity to the stationary phase in both TLC and HPLC.

greater affinity to the mobile phase in TLC but a greater affininty for the stationary phase in HPLC

greater affinity to the mobile phase in both TLC and HPLC

A student extracts the colour from some green smarties and uses paper chromatography to separate components colours. She finds blue has a R f =0.38 and yellow R f =0.75 this suggests

the blue is more strongly adsorbed onto the stationary phase and is less solublein the mobile phase.

the yellow is more strongly adsorbed onto the stationary phase and is less soluble in the mobile phase.

the yellow is more strongly adsorbed onto the stationary phase and is more soluble in the mobile phase.

the blue is more strongly adsorbed onto the stationary phase and is less soluble in the mobile phase.

A high R f value indicates strong

strong affinity to the mobile phase

strong affinity to the stationary phase

no affinity to the stationary phase

A low retention time indicates

a high affinity to the mobile phase

a low affinity to the stationary phase

a high solubility in the mobile phase

In GC, retention depends upon the

Vapor pressure and polarity of the solute

The method of sample introduction

. Ion exchange chromatography is based on the

electrical mobility of ionic species

Thin layer chromatography is

electrical mobility of ionic species

A characteristic feature of any form of chromatography is the ...

use of a mobile and a stationary phase.

calculation of an Rf value for the molecules separated.

use of molecules that are soluble in water.

In gas chromatography, the concentration of a substance can be determined by ...

comparison of the area under the peak produced by the substance with the areas under the peaks produced by standard solutions.

comparison of the Rt of the substance with that of a standard.

measurement of the height of the peak produced by the substance.

calculation of the Rt value of the substance.

Thin layer chromatography can be used to distinguish between different amino acids. If a particular amino acid has low solubility in the mobile phase used, then the amino acid ...

will spend more time dissolved in the mobile phase than attached to the stationary phase.

must have a high molecular mass.

will move at a speed close to that of the solvent.

Acetone is an organic molecule with a semi-structural formula of CH3COCH3. A student runs a sample of acetone through a gas chromatogram at 50°C. The acetone produces a peak after 4.2 minutes. The student then injects a mixture of unknown organic substances into the same column at the same temperature. There are peaks after 3.1, 4.2 and 7.4 minutes. From this information, it can be concluded that ...

the mixture has three componenets, one of which must be acetone.

the mixture has three componenets, but acetone is not one of them.

the mixture has at least three components, one of which must be acetone.

the mixture has at least three components, one of which might be acetone.

The basis of the technique of chromatography for separating components of a mixture is ...

the interaction of the components with both stationary and mobile phases.

the differing movement of particles of different mass in an electric field.

the absorption of infrared radiation by the components.

the deflection of charged particles in a magnetic field.

High Performance Liquid Chromatography

High Performance Layer Chromatography

Highly Placed Liquid Chromatography

Hard Performance Liquid Chromatography

Chromatography Rf

Authored by Charles Martinez

Chemistry

12th Grade

NGSS covered

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The physical separation of mixtures into individual components is..

chromatography

opacity

latent

trace evidence

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Two or more substances that are mixed together but not chemically combined is a ___

compound

mixture

keratin

chromatography

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Two or more substances that are chemically combined is a ___

compound

mixture

solvent

solute

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Ink can be separated by a method of -----------------------------------------------

distillation

filtration

chromatography

sedimentation

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

On the chromatogram given -------------- is mixture.

red

orange

green

black

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

A pure substance shows ------------------ spot on chromat gram

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

The diagram below shows a chromatogram obtained when a sample X was analysed together with four other known dyes P, Q, R and S. Dye Q was known to cause cancer. Which of the following dye(s) is/are safe for use?

P only

S only

P and S

P and X

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Chromatography Rf

The physical separation of mixtures into individual components is..

Two or more substances that are mixed together but not chemically combined is a ___

Two or more substances that are chemically combined is a ___

Ink can be separated by a method of -----------------------------------------------

On the chromatogram given -------------- is mixture.

A pure substance shows ------------------ spot on chromat gram

The diagram below shows a chromatogram obtained when a sample X was analysed together with four other known dyes P, Q, R and S. Dye Q was known to cause cancer. Which of the following dye(s) is/are safe for use?

In Chromatography the retardation factor R_f are used for identification of components. A high R_fand a low R_t (retention time) mean the component has a

In Chromatography the retardation factor R_f is used for identification of components. A low R_fand a high R_t (retention time) mean the component has a

In Chromatography the retardation factor R_f are used for identification of components. A low R_fand a low R_t (retention time) mean the component has a

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Chemistry

Chromatography Rf

The physical separation of mixtures into individual components is..

Two or more substances that are mixed together but not chemically combined is a ___

Two or more substances that are chemically combined is a ___

Ink can be separated by a method of -----------------------------------------------

On the chromatogram given -------------- is mixture.

A pure substance shows ------------------ spot on chromat gram

The diagram below shows a chromatogram obtained when a sample X was analysed together with four other known dyes P, Q, R and S. Dye Q was known to cause cancer. Which of the following dye(s) is/are safe for use?

In Chromatography the retardation factor Rf are used for identification of components. A high Rf and a low Rt (retention time) mean the component has a

In Chromatography the retardation factor Rf is used for identification of components. A low Rf and a high Rt (retention time) mean the component has a

In Chromatography the retardation factor Rf are used for identification of components. A low Rf and a low Rt (retention time) mean the component has a

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Chemistry

In Chromatography the retardation factor R_f are used for identification of components. A high R_fand a low R_t (retention time) mean the component has a

In Chromatography the retardation factor R_f is used for identification of components. A low R_fand a high R_t (retention time) mean the component has a

In Chromatography the retardation factor R_f are used for identification of components. A low R_fand a low R_t (retention time) mean the component has a