SECTION A [20 MARKS]
1. Which of the following is an example of the application of chemistry in a home?
a. Amplifiers in a radio
b. The use of cosmetics
c. Production of ammonia in the Haber process
d. Industrial production of alcohol
2. Mr. M’tonga asked pupils at blessing private academy to explain what happens to the particles in
a stone when it is heated. The correct explanation is …
a. Will not move
b. Move randomly
c. Vibrate more in their fixed positions
d. Vibrate and begin to move randomly
3. Air is used to inflate tyres because …
a. It is readily compressible
b. Its molecules move randomly
c. It serves as a coolant
d. It gets into the tyres faster than other substances
4. Which one of the following sublimes when strongly heated?
a. Common salt crystals
b. Copper (II) sulphate crystals
c. Potassium iodine crystals
d. Iodine crystals
5. The best method to separate a mixture of sand and diesel is …
a. Decantation
b. Distillation
c. Evaporation
d. Filtration
6. The graph below is a heating curve for a pure substance.
The melting point of this substance is …
a. 0℃
b. 17℃
c. 100℃
d. 115℃
7. If two liquids are miscible, they must be separated by …
a. A separating funnel
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b. Filtration
c. Crystallization
d. Fractional distillation
8. Which of the following is not true about evaporation?
a. It involves a physical change of state
b. The particles gain kinetic energy
c. It is a non-reversible change
d. It weakens the intermolecular forces of attraction
9. Which state(s) of matter exists at freezing point of a substance?
a. Solid only
b. Solid and liquid
c. Liquid only
d. Liquid and gas
10. Identify the measuring apparatus shown in the diagram below
a.
b.
c.
d.
Conical flask
Density bottle
Separating funnel
Volumetric flask
11. The diagram below shows the experimental set up for the determination of the boiling point of a
liquid.
Which statement explains the purpose of adding porcelain chips?
a. For smooth boiling of the liquid
b. To colour the liquid as it starts to boil
c. To make the liquid boil faster
d. For the thermometer to record the temperature easily
12. The best and suitable method of collecting pure water from a solution of ink is …
a. Chromatography
b. Distillation
c. Crystallization
d. Filtration
13. The diagram below shows apparatus used to carry out fractional distillation.
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Which part labeled A, B, C or D represents a fraction?
14. Which of the following is not one of the three classes of substances?
a. Compound
b. Neutron
c. Element
d. Mixture
15. Which of the following sets contain particles with the same number of electrons?
a. Sodium, potassium and lithium ion
b. Sodium ion, neon and oxide ion
c. Hellium, neon and argon
d. Magnesium, calcium and beryllium
16. What term is give to atoms of the same element with the same atomic number but different mass
number?
a. Isoelectronic
b. Isomers
c. Isotope
d. Isobars
17. Hydrogen can form both ionic and covalent compounds. With which element will hydrogen form
an ionic compound?
a. Zinc
b. Sodium
c. Nitrogen
d. Sulphur
18. When two atoms share electron, they form …
a. An ionic compound
b. A molecule
c. A lattice
d. An allotrope
19. Metallic bonding is the …
a. Loss and gain of electrons between metallic and non-metallic atoms
b. Sharing of electrons between non-metallic atoms
c. Force of attraction between valence electrons and the metal ions
d. Electrostatic force that exists between all protons and all electrons
20. The formula for copper (I) Oxide is …
a. CuO
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b. CuO2
c. Cu2O
d. 2CuO
SECTION B [45 MARKS]
1.
a. Describe the type of movement of particles in;
i.
Solids……………………………………………………………………….………………………………………………
ii.
Liquids…………………………………………………………………………..…………………………………….[2]
b. Chemistry has been found to improve the livelihood of manhood. State any two benefits of
chemistry to mankind.
i.
……………………………………………………………………….……………………………………………………….
ii.
………………………………………………………………………………………………….………………………..[2]
[Total: 4 marks]
2. Matter is made up of three basic units.
a. State the three basic units of matter.
……………………………………………………………………………………………………………………………………………
……………………………………..………………………………………………………………………………….……………. [3]
b. Give the basic units of matter contained in common salt.
……………………………………………………………………………………….……………………………………..………. [1]
c. Noble gases like argon are made up of one of the basic unit particles. State the basic particles
in noble gases. …………………………………………………………………….…………….…..……………………… [1]
[Total: 5 marks]
3. The diagram below shows one of the laboratory apparatus.
a. Name the apparatus ………………………………………………………………………………………………………. [1]
b.
i.
State the use of the apparatus shown above
………………………………………………………………………………………………………………….………. [1]
ii.
Suggest two substances that can be separated by the apparatus shown above when
combined.
……………………………………………………………………………………………………………..…………… [2]
[Total: 4 marks]
4. Two miscible liquids with boiling points of 78℃ and 100℃ were accidentally mixed.
a. Name the process which can be used to separate the mixture.
…………………………………………………………………………………………………………….………………………… [1]
b. Draw a labeled diagram showing the arrangement of the apparatus used to separate the
mixture.
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[3]
c. Explain how you can obtain hydrated sodium sulphate crystals from an aqueous solution of
sodium sulphate.
……………………………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………………….……… [2]
[Total: 6 marks]
5.
a. The table below shows the description of substances A, B and C.
i.
Give the physical state of each of them
Substance
A
B
C
Particles occupy
Particles
closely Particles
moves
Description
any space
packed.
randomly within the
available.
space
of
the
substance
State of matter
…………………..
……………………
…………………..
[3]
ii.
How can substance C attain the structure of substance A?
………………………………………………………………………………………………………………….………. [1]
b. Substance B is said to be a pure substance. Give a characteristic which proves that B is a
pure substance when melting.
…………………………………………………………………………………………….………………………………………… [1]
[Total: 5 marks]
6. The diagram below represents electronic arrangement of a particular atom. Study this diagram
and answer the questions that follow.
a. The relative atomic mass of the atom represented is 23.
i.
What is its proton number?
…………………………………………………..……………………………………………………………………… [1]
ii.
What is its neutron number?
………………………………………………………………………………………………………………………………
…………………..……………………………………………………………………………………………………… [2]
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b.
i.
In which group of the periodic table is the element found?
………………………………………………………………………………………………………………………….. [1]
ii.
Explain your answer in (b)(i).
………………………………………………………………………………………………………………………………
………………………………………………………………………………………………………………………….. [1]
[Total: 5 marks]
7. The diagrams below show atoms of sodium and chlorine.
a. State the type of bond that exists in the compound formed when the two elements combine.
………………………………………………………………….………..…………………………………………………………. [1]
b.
i.
Draw the structure of the compound formed when sodium and chlorine combine
ii.
State the chemical formula for sodium chloride.
………………………………………………………………………………………………………………………….. [1]
c. Explain in terms of bonding and structure why sodium chloride has the following properties:
i.
A very high melting point.
………………………………………………………………………………………………………………………………
………………………………………………………………………………………………………………………….. [1]
ii.
High electrical conductivity when molten
………………………………………………………………………………………………………………………………
…..……………………………………………………………………………………………………………………… [1]
[Total: 5 marks]
8. Use the periodic Table to help you answer this question.
a. Name the element in Group V which is in the same period as sodium.
……………………………………………………………………………………………….…………………………….……….. [1]
b. State the number of protons and neutrons in one atom of the element named in (a) above.
Protons ………………………………………………………………………..……………………………………….………. [1]
Neutrons ………………………………………………………………………………………………………………………. [1]
c. Write the electronic configuration of the element named in (a).
……………………………………………………………………………………………………………………………..………. [1]
d. Explain why the named element in (a) is placed in Group V.
………………………………………………………………………………………………….…………………………………... [1]
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[Total: 5 marks]
9. When caesium metal is reacted with water, there is a rise in temperature.
a.
i.
How would you detect the rise in temperature?
………………………………………………………………………………………….………………………………. [2]
ii.
What type of reaction takes place?
………………………………………………………………………………………………………………………….. [1]
b. Potassium is found in the same group of the periodic table as caesium.
i.
Compare the reaction of the two metals with water.
………………………………………………………………………………………………………………………………
………………………………………………………………………………………………………………….………. [1]
ii.
Give a reason for your answer in (b)(i) above.
………………………………………………………………………………………………………………………………
……………………………………………………………………………………………….…………………………. [2]
[Total: 6 marks]
SECTION C [20 MARKS]
There are three (3) questions in this section. Answer any two (2).
1.
a. Explain the meaning of;
i.
A filtrate
ii.
A residue
b. Describe two ways of separating a solid from a liquid in a suspension.
c.
i.
State one difference between simple distillation and fractional distillation.
ii.
Name two industries in Zambia where fractional distillation is used.
[2]
[4]
[2]
[2]
2. Two elements X and Y are represented by the notation shown below
23X11
16Y8
a. Construct electron shell diagrams to show the arrangement of electrons in the atoms of X and
Y.
[4]
b.
i.
State the type of bond created when atoms of element X and Y react together.
[1]
ii.
Draw a Dot and Cross diagram for a compound formed between X and Y.
[3]
c. State any two physical properties of the compound formed between X and Y.
[2]
3. Caesium, Lithium, Potassium and Sodium are in group 1 of the periodic table.
a. Place the metals in order of their reactivity series starting with the most reactive.
[1]
b. All group 1 elements react in a similar manner with water.
i.
Name the chemical products of the reaction of caesium with water.
[2]
ii.
Write a balanced chemical equation for the reaction of caesium with water include
state symbols.
[3]
iii.
State three things you would expect to see if small pieces of caesium were dropped in
water in a glass beaker.
[3]
c. What is the other name for group 1 elements?
[1]
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