SIAMAFUMBA PRIMARY AND SECONDARY SCHOOL
GRADE 10 END OF TERM 1 TEST -2023
SUBJECT: SCIENCE PAPER 2
DURATION: 2 HOURS 30 MINUTES Marks: 100
INSTRUCTIONS: There are two sections in this paper. Answer all the questions.
SECTION A (20 Marks)
1. The movement of particles from a region of higher concentration to a region of low
concentration is referred to as…
A. Diffusion B. Osmosis C. Matter D. Molecular movement
2. Which state of matter exits at the freezing point of a substance?
A. Liquid B. Solid C. Gas and Solid D. Liquid and Gas
3. The best method of collecting pure water from a solution of ink is..
A. Distillation B. Filtration C. Chromatography D. Crystallization
4. Which test could be used to show that a sample of water is pure. It…………..
A. It freezes at exactly O°C
B. Is colorless and tasteless
C. It is neutral to litmus
D. Turns an hydrous copper(II) sulphate from white to blue
5. A gas escaping from a pipe in a chemical plant is tested and found to be alkaline. What is this
gas?
A. Ammonium B. Carbon dioxide C. Hydrogen D. Oxygen
6. The following diagram is a cooling curve for a gas.
Which process occurs at A and B?
Boiling B. Condensation C. Melting D. Sublimation
7. A measuring cylinder below is used to measure the volume of a liquid. What is the volume of the
liquid contained in the cylinder?
8. If two liquids are miscible. They must be separated by……………. A. Filtration B. Separating
funnel C. Decantation D. Fractional Distillation
9. Air is used to inflate tyres because.
A. Its molecules move randomly
B. It is readily compressed
C. It serves as a coolant
D. It inflates the tyre much faster
10. Which of the following is a chemical change?
A. Boiling water B. freezing a liquid C. magnetizing iron D. rusting of iron
11. Study the diagram below showing the heating curve of a pure substance.
12. The diagram below shows apparatus used to carry out Fractional Distillation.
Which part labeled A, B, C or D represents a ‘fraction’
13. Which of the following substance is an alloy?
A. Bronze B. Aluminium C. Nitrogen D. Cement
14. Which of the following is a set of three elements?
A. Argon, lime, water
B. Copper, petrol, alcohol
C. Potassium, graphite, nitrogen
D. Silica, hydrogen, oxygen
15. Identify a mixture of substances that can be separated using the following apparatus
A. Common salt and iodine solution
B. Sugar solution and alcohol
C. Water and paraffin
D. Alcohol and water
16. Which of the following apparatus is used for heating and burning?
A. Burette B. Evaporating dish C. Flask D. Bunsen burner
17. Which of the following is not a factor that affects the rate of evaporation?
A. Surface area B. Wind current C. Weight D. Temperature
18. The following list comprises substances that sublime except for one. Which one is it?
A. Nitrogen B. Iodine C. Ammonium Sulphate D. Ammonium chloride
19. The change of state from gas to liquid is called………
A. Condensation B. Evaporation C. Liquefaction D. Melting
20. Which one is the industrial use of Fractional Distillation?
A. Separation of salt from sea water
B. Preparation of acids
C. Separation of paraffin and water
D. Separation of crude oil.
SECTION B (80 marks)
There are eight questions in this section. Answer all the questions
1. Use the kinetic theory of matter to explain why:
a. Liquids cannot be compressed
b. Liquids flow
c. Smoking can cause lung damage the people
d. When solids are placed close to each other, they do not mix freely
e. Solids have high densities
2. Study the list of apparatus below:
Thermometer, burette, measuring cylinder, beam balance, spring balance
Which apparatus can be used to measure:
a. Mass
b. A fixed volume of a liquid
c. Weight
d. Temperature
e. Volume of liquids
3. Distinguish between physical and chemical changes
Physical changes Chemical changes
1. 1.
2. 2.
3. 3.
4. Define the following terms:
a) Matter
b) Solvent
c) Melting
d) Sublimation
e) Diffusion
5. (a) Illustrate the changes of state of matter in the following
i. Freezing point
ii. Condensation
iii. Boiling point
(b) Describe three factors that affect the rate of diffusion
6. Study the diagram below and then answer the questions that follow.
a) What is the reading of the thermometer?
b) What must be done to the melting ice for it to completely change to the next state of matter?
c) Describe the change of state the ice will undergo in question (b) above.
d) What term is used to describe the temperature at which ice changes its state?
e) Some substances can change state from solid state to gaseous state without becoming a liquid.
What term is used to describe such a reaction?
f) Name two substances that change states from solid to gas.
10 marks
7. Choose from the following terms to answer the questions that follow.
Sublimation, liquefaction, diffusion, ion, matter, Kelvin
Which of the following terms describe:
a) A gas changing to liquid
b) The physical material of the universe
c) The basic unit of matter
d) The spreading movement of particles
e) Carbon dioxide changing to dry ice
10 marks
8. Study the following diagram and answer the questions that follow
Two miscible liquids (water and ethanol) with boiling points 78°c and 100°c were mixed
accidentally.
a) Name the process used above to separate the mixture
b) State two properties of the mixture that allows the separation to take place.
c) What is the function of the apparatus labeled ‘’U’’
d) Name the first part of the mixture that would be collected in the flask.
e) Suggest one industrial use of the separation technique shown in the diagram.
10 marks
