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

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Potassium is more reactive than sodium

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Neon and Argon do not form compounds with any element

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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

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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. ___________________________________________________________

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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.

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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?

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

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

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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 | __________

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