Choose the correct answer and write its letter in the table below. i. A person who studies chemistry is called a A. Scientist B. Chemist C. Biologist D. Chemical ii. Item which can easily catch fire is known as A. Toxic B. Corrosive C. Flammable D. Explosive iii. Bunsen burner produces the hottest flame when A. The air hole is closed B. The air hole is fully opened C. The air hole is half opened D. The gas tap is opened iv. Positively charged ion is called A. Anion B. Neutral ion C. Cation D. Radical v. The main physical states of matter are A. Two B. Four C. Three D. Five vi. One of the following is an example of a chemical change A. Rusting of iron B. Melting of ice C. Cloud changing into rain D. Magnetizing of iron vii. When Oxygen reacts with Sodium it forms A. Acidic oxide B. Neutral oxide C. Basic oxide D. Amphoteric oxide viii. A gas that is used as a fuel A. Nitrogen B. Methane C. Oxygen D. Water vapour ix. Pure water boils at A. 800C B. 700C C. 1000C D. 10000C x. Common salt dissolves more in A. Kerosene B. Water C. Petrol D. Diesel

Match the meanings in LIST A with their corresponding situations in LIST B. Write the letter of the correct answer in the table below. LIST A i. Swallowing, inhaling or absorbing harmful substance in the body. ii. Loss of consciousness caused by lack of sufficient blood and oxygen to the brain. iii. The condition in which the body system is unable to take enough blood to the vital organs. iv. Blockage of upper part of the air way by food or other objects. v. Skin injury that causes a change in the colour of the skin. vi. Injuries resulting from the body coming into contact with heat or harmful chemicals. vii. The condition in which the lungs are not getting enough oxygen causing difficulty in breathing. viii. Occurs when a person comes into direct contact with electricity. ix. The loss of blood usually occurs from a visible wound. x. The removal of the content of the stomach through the mouth. LIST B A. Bleeding B. Burns C. Fainting D. Bruises E. Nose bleeding F. Poisoning G. Vomiting H. Choking I. Shock J. Electrical shock K. Suffocation L. Drowning

1. Swallowing, inhaling or absorbing harmful substance in the body. (1 alama)
2. Loss of consciousness caused by lack of sufficient blood and oxygen to the brain. (1 alama)
3. The condition in which the body system is unable to take enough blood to the vital organs. (1 alama)
4. Blockage of upper part of the air way by food or other objects. (1 alama)
5. Skin injury that causes a change in the colour of the skin. (1 alama)
6. Injuries resulting from the body coming into contact with heat or harmful chemicals. (1 alama)
7. The condition in which the lungs are not getting enough oxygen causing difficulty in breathing. (1 alama)
8. Occurs when a person comes into direct contact with electricity. (1 alama)
9. The loss of blood usually occurs from a visible wound. (1 alama)
10. The removal of the content of the stomach through the mouth. (1 alama)

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Potassium is more reactive than sodium

1. Charcoal is made by the dry _______________ of ______________ in a limited supply of air. (2 alama)
2. In periodic table_________________ are arranged according to the __________________ of their atomic numbers. (2 alama)
3. Water can exist in different physical states namely solid, ______________ and ________________. (2 alama)
4. Heat is the ____________________ of being __________________________. (2 alama)
5. Atoms can be represented by symbols that indicate their respective ___________________ and ___________________ numbers. (2 alama)

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Neon and Argon do not form compounds with any element

1. Define the term Chemistry. (2 alama)
2. Mention any five (5) fields where the knowledge of chemistry can be applied. (5 alama)

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a. Define the following terms i. Boiling point ii. Period b. Give reason(s) for each of the following cases in periodic table. i. Group I elements are called alkali metals ii. Electro negativity increases from left to the right across the period iii. Potassium is more reactive than sodium iv. Neon and Argon do not form compounds with any element

1. Define the term Boiling point. (2 alama)
2. Define the following terms i. Boiling point ii. Period (4 alama)
3. Define the term Period. (2 alama)
4. Give reason(s) for each of the following cases in periodic table. i. Group I elements are called alkali metals ii. Electro negativity increases from left to the right across the period iii. Potassium is more reactive than sodium iv. Neon and Argon do not form compounds with any element (16 alama)
5. Give reason(s) for the following case: Group I elements are called alkali metals. (2 alama)
6. Give reason(s) for the following case: Electronegativity increases from left to the right across the period. (2 alama)

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a. What is the meaning of scientific procedure? ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ b. Mention three (3) types of variable as used in scientific procedures. i. ___________________________________________________________ ii. ___________________________________________________________ iii. ___________________________________________________________ c. Write the missing steps A, B and C in the scientific procedures from the following flow chart in the space provided below. A Hypothesis B Data collection and analysis Data interpretation C A. ___________________________________________________________ B. ___________________________________________________________ C. ___________________________________________________________

1. What is the meaning of scientific procedure? (3 alama)
2. (1 alama)
3. (1 alama)
4. (1 alama)
5. Mention three (3) types of variable as used in scientific procedures. (3 alama)
6. (1 alama)
7. Write the missing steps A, B and C in the scientific procedures from the following flow chart in the space provided below. A Hypothesis B Data collection and analysis Data interpretation C (2 alama)

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a. Define the term fuel. b. List two (2) classes of fuels according to their occurrence. c. List down five (5) sources of energy which are environmental friendly. d. Mention four (4) ways in which energy can be converted from one form to another.

1. Define the term fuel. (0 alama)
2. List two (2) classes of fuels according to their occurrence. (0 alama)
3. List down five (5) sources of energy which are environmental friendly. (0 alama)
4. Mention four (4) ways in which energy can be converted from one form to another. (0 alama)

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a. Briefly explain three (3) sub-atomic particles. b. What is isotopy? c. Consider the following atoms 12C and 13C, find their: i. Atomic number and mass number of each atom. ii. Number of neutrons in each atom. iii. What do you observe from these two atoms?

1. Briefly explain three (3) sub-atomic particles. (0 alama)
2. What is isotopy? (0 alama)
3. Atomic number and mass number of each atom. (0 alama)
4. Number of neutrons in each atom. (0 alama)
5. What do you observe from these two atoms? (0 alama)

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ii. Why is air a mixture and not a compound?

1. Give the meaning of the following terms. i. Element ii. Solvent iii. Compound (6 alama)
2. Give the meaning of the term Element. (2 alama)
3. Classify the following elements into metals and non metals: Carbon, Oxygen, Calcium, Nitrogen and Lithium. (5 alama)
4. Write down the symbol of Iodine. (1 alama)
5. (1 alama)
6. (1 alama)
7. Write down the symbol of the following elements. i. Iodine ii. Magnesium iii. Aluminium iv. Neon (4 alama)
8. Give the meaning of the term Solvent. (2 alama)
9. Write down the symbol of Magnesium. (1 alama)
10. Why is air a mixture and not a compound? (2 alama)
11. (1 alama)
12. Write down the symbol of Aluminium. (1 alama)
13. Give the meaning of the term Compound. (2 alama)
14. Write down the symbol of Neon. (1 alama)

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b. Name two (2) physical properties of water.

1. (1 alama)
2. (1 alama)
3. Name one physical property of water. (1 alama)
4. Name four (4) importance of water in everyday life. (4 alama)
5. How can you test the presence of water in the air? (4 alama)
6. Name another physical property of water. (1 alama)
7. (1 alama)

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Name the methods that can be used to separate the following mixtures in the laboratory. Mixtures | Methods ---------------------------|--------- Iodine and sand | __________ Oil from ground nut | __________ Pure water from muddy water| __________ Water from the mixture of oil and water | __________ Water and ethanol | __________

1. Name the methods that can be used to separate the following mixtures in the laboratory. (5 alama)
2. Study the table below which shows reactions between some non- metals with Oxygen, then fill the blanks. (6 alama)
3. Outline two (2) chemical properties of Oxygen. (4 alama)
4. ii. Draw the following apparatus in the table below. Liebig condenser | Tripod stand (3 alama)
5. List down any two (2) uses of Oxygen. (2 alama)
6. How can Oxygen be tested in the laboratory? (3 alama)
7. iv. How can Oxygen be tested in the laboratory? (2 alama)

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