1. States of matter

1.1 Solids, liquids and gases

1.2 Diffusion

2. Atoms, elements and compounds

2.1 Elements, compounds and mixtures

2.2 Atomic structure and the Periodic Table

2.3 Isotopes

2.4 Ions and ionic bonds

2.5 Simple molecules and covalent bonds

2.6 Giant covalent structures

2.7 Metallic bonding

3. Stoichiometry

3.1 Formulae

3.2 Relative masses of atoms and molecules

3.3 The mole and the Avogadro constant

4. Electrochemistry

4.1 Electrolysis

4.2 Hydrogen–oxygen fuel cells

5. Chemical energetics

5.1 Exothermic and endothermic reactions

6. Chemical reactions

6.1 Physical and chemical changes

6.2 Rate of reaction

6.3 Reversible reactions and equilibrium

6.4 Redox

7. Acids, bases and salts

7.1 The characteristic properties of acids and bases

7.2 Oxides

7.3 Preparation of salts

8. The Periodic Table

8.1 Arrangement of elements

8.2 Group I properties

8.3 Group VII properties

8.4 Transition elements

8.5 Noble gases

9. Metals

9.1 Properties of metals

9.2 Uses of metals

9.3 Alloys and their properties

9.4 Reactivity series

9.5 Corrosion of metals

9.6 Extraction of metals

10. Chemistry of the environment

10.1 Water

10.2 Fertilisers

10.3 Air quality and climate

11. Organic chemistry

11.1 Formulae, functional groups and terminology

11.2 Naming organic compounds

11.3 Fuels

11.4 Alkanes

11.5 Alkenes

11.6 Alcohols

11.7 Carboxylic acids

11.8 Polymers

12. Experimental techniques and chemical analysis

12.1 Experimental design

12.2 Acid–base titrations

12.3 Chromatography

12.4 Separation and purification

12.5 Identification of ions and gases

IGCSE Chemistry 12.3 Chromatography Question Bank

[Maximum number: 1]

Give the name of the process that is used:

(a)

to separate a mixture of coloured dyes.

[ 1 ]

[Maximum number: 1]

Amino acids are colourless and can be separated and identified by chromatography.

What additional apparatus is required to identify the amino acids present in a mixture?

a locating agent

a ruler

a ruler and a locating agent

neither a ruler or a locating agent

(a)

Give the name of the process that:

[ 1 ]

(i)

is used to separate a mixture of amino acids.

[ 1 ]

[Maximum number: 1]

Give the name of the process that is used:

(a)

to separate a mixture of amino acids.

[ 1 ]

(a)

State the name of the process that is used to

[ 1 ]

(i)

separate the individual dyes in ink,

[ 1 ]

[Maximum number: 1]

Give the name of the process that is used:

(a)

to separate the products of hydrolysis of long chain carbohydrates

[ 1 ]

[Maximum number: 1]

Name the process used to:

(a)

identify the components of a mixture of soluble coloured substances

[ 1 ]

Amino acids are colourless and can be separated and identified by chromatography.

What additional apparatus is required to identify the amino acids present in a mixture?
A a locating agent
B a ruler
C a ruler and a locating agent
D neither a ruler or a locating agent

[Maximum number: 1]

Paper chromatography is done in the same way with three different mixtures of dyes. Each mixture contains at least one of the dyes W, X, Y and Z.

The $R_{\mathrm{f}}$ values of the dyes in the three mixtures are shown.

Which conclusion is correct?

Dye W is nearest the solvent front and is present only in mixture 1 and mixture 3.

Dye X has travelled furthest up the chromatography paper.

Dye Y is the only dye present in all three mixtures.

Dye Z is nearest the solvent front and is found in only two of the mixtures.

[Maximum number: 1]

A chromatography experiment is carried out to analyse the pigments present in four different types of leaf. The student carrying out the experiment forgot to complete his table of results, which is shown.

Which row identifies the values of F, G and H ?

3.2

0.80

3.5

0.83

3.2

0.86

3.5

0.78

0 selected

Question 1

Question 1(e)

Question 1

Question 1

Question 1(a)

Question 1(a)(v)

Question 1

Question 1(f)

Question 1

Question 1(a)

Question 1(a)(ii)

Question 1

Question 1(f)

Question 1

Question 1(e)

Question 1

Question 2

Question 2