Chemistry Final Exam Practice || All Chapters

Paper 3 || Structured Questions

Chapter 1 || Particles and Purification

1. Give the definition of the followingi. Diffusion ______________________________

ii. Evaporation____________________________iii. Condensation___________________________iv. Distillation_____________________________v. Solid__________________________________

vi. Liquid_________________________________vii. Gas___________________________________

2. Fill in the blanks from the following box of words.

A solid can be separated from a liquid by ______________.

Chromatography Crystallization Distillation Filtration

A mixture of two liquids can be separated by ______________.A solid can be obtained from its solution by ______________.A mixture of amino acids can be separated by ______________.

3. Match the following

Volumetric Flask

Can be used to measure out approximately 20cm3 of a solution

Measuring Cylinder

Can be used to mix solutions

Burette Can be used to make up 500cm3 of a solution accurately

Beaker Used to change a vapour back to a liquidCondenser Can be used to measure out 18.5cm3 of a

liquid

4. Draw a diagram to show chromatography.

5. Use ideas about the particles to explain whya. A balloon gets bigger when you blow into it

_____________________________________________________________________________________________________________________

b. Solids have a fixed shape_____________________________________________________________________________________________________________________

c. You can’t squeeze a sealed syringe full of water_____________________________________________________________________________________________________________________

6. Label these apparatus’.

7. Answer the following questions

i. State what is A, B and C.___________________________________________________________________________

ii. Which 2 of these changes of state occur when energy is absorbed? Explain your answer using ideas about forces between particles.

_____________________________________________________________________________________________________________________

Solid Liquid Gas

Freezing

A B

C

______________________________________________________________________________

iii. Describe the arrangement and motion of the particles in a gas._____________________________________________________________________________________________________________________

iv. A list of solids, liquids and gases is given below :

a. Name 2 substances that are gases at r.t.p______________________________

b. Name 2 substances that are solids at r.t.p______________________________

Ethanol Iron Nitrogen Oxygen Salt Water

v. Orange juice is a liquid. Explain why orange is NOT chemically pure.______________________________________________________________________________

8. Look at the following diagrams and answer the following questions.

i. Three different mixtures of dyes A,B and C were spotted onto a piece of chromatography paper. Two more pure dyes, D and E were also spotted onto the same piece of paper

a. Where was dye A placed at the start of the experiment?______________________________________________________________________________

b. Which mixture contained the greatest number of different dyes?______________________________________________________________________________

c. Which dye contains both the pure dyes D and E?______________________________________________________________________________

d. Which dye mixture contains neither dye D nor dye E?______________________________________________________________________________

Chapter 2 || Atoms, Elements and Compounds

1. Chlorine has two isotopes, 3517 Cl ad 37

17Cli. What do you understand by the term isotope?

______________________________________________________________________________

ii. Write down the number of neutrons in each of these isotopes of chlorine._____________________________________________________________________________________________________________________

iii. Draw and label a diagram of an atom of chlorine to show :---- the nucleus--- the electron shells, with the correct number of electrons in each shell

iv. A chloride ion has eight electrons in its outer shell. What is the importance of this electronic configuration?_____________________________________________________________________________________________________________________

2. Iron is a grey magnetic metal that reacts with hydrochloric acid to produce hydrogen. Sulfur is a yellow non-metal that does not react with acids.Iron (II) Sulfide is a brownish-black compound. It is a solid that is not magnetic when pure. It reacts with hydrochloric to produce smelly hydrogen sulfide gas.

a. What do you understand by the term compound?______________________________________________________________________________

b. Describe two differences between a mixture of iron and sulfur and a compound of iron and sulfur.____________________________________________________________________________________________________________________________________________________________

c. Give the electronic configuration of sulfur. How does this configuration show that sulfur is in Group VI of the Periodic Table? What determines the position of an element in the Periodic Table?_________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

3. Isotopes can be classed as radioactive and non-radioactive.i. What do you understand by the term

radioactive isotope?_____________________________________________________________________________________________________________________

ii. State one medical and one industrial use of radioactive isotope.____________________________________________________________________________________________________________________________________________________________

iii. Deuterium, 21H, is non-radioactive isotope.

Draw a diagram to show the complete atomic structure of deuterium. Label it as well.

iv. How does an atom of deuterium differ from a normal hydrogen atom?______________________________________________________________________________

4. Sodium is a soft, shiny metal with low melting point.Chlorine is a poisonous green gas. Sodium reacts with chlorine to form sodium chloride, a white, crystalline solid with a high melting point.

i. Describe three properties shown by most metals._____________________________________________________________________________________________________________________

ii. Describe two properties of sodium that make it an unusual metal.____________________________________________________________________________________________________________________________________________________________

iii. Give two reasons why chlorine is classed as a non-metal.______________________________________________________________________________

iv. Use the information above to explain why sodium chloride is a compound of sodium and chlorine rather than a mixture of sodium and chlorine.____________________________________________________________________________________________________________________________________________________________

v. State the electronic configuration of Sodium ion: - ___________________________Chlorine ion: - __________________________

5. The electronic structure of the atoms of five elements in the Periodic Table.

A || 2, 8, 2B || 2, 8, 6C || 2, 1D || 2, 8E || 2, 6

a. Which of these elements is in Group II of the Periodic Table? Give a reason_____________________________________________________________________________________________________________________

b. Which two of these elements are in the same group in the Periodic Table?______________________________________________________________________________

c. Which one of these elements has the highest proton number?______________________________________________________________________________

d. Element E is oxygen. An isotope of oxygen has eight neutrons.What do you understand by the term isotope? State the nucleon number of this isotope of oxygen._____________________________________________________________________________________________________________________

e. Element C is lithium. Lithium is a metal. Describe three differences between the physical and chemical properties of lithium and oxygen.____________________________________________________________________________________________________________________________________________________________

Chapter 3 || Structure and Bonding

1. Potassium chloride , KCl, has a giant ionic structure but methane, CH4, is a simple molecule

a. State 3 differences between the physical properties of potassium chloride and methane._____________________________________________________________________________________________________________________

b. Draw a dot-and-cross diagram to show the electronic structure of a potassium ion and a chloride ion.

c. Draw a dot-and-cross diagram to show the structure of methane.

2. The diagram shows the structures of diamond and

graphite.

i. Describe two ways in which these structures are similar.______________________________________________________________________________

ii. Describe two differences between these structures.______________________________________________________________________________

iii. State the name given to these types of structures._______________________________________

iv. Explain why graphite is used as a lubricant by referring to its structure._____________________________________________________________________________________________________________________

v. State one use of diamond.

_______________________________________

3. Hydrogen chloride is a covalent compound. It is a colourless gas.

i. Draw a dot-and-cross diagram for hydrogen chloride, showing all the electron shells.

ii. Hydrogen Chloride reacts with water to form a solution that contains hydrogen ions and chloride ions.

In what way is its structure different from other simple covalent bonded structures?_______________________________________

iii. Draw a structure of a hydrogen ion and a chloride ion.

4. The structure of carbon dioxide, diamond and silicon dioxide are shown.

a. In what state does carbon dioxide and diamond exist in room temperature? Explain your answer.

____________________________________________________________________________________________________________________________________________________________

b. Draw a dot-and-cross diagram for carbon dioxide, showing only the outer electron shells.

c. Give one similarity between the structure of diamond and silicon.______________________________________________________________________________