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CHEMISTRY DEPARTMENT WAID ACADEMY Standard Grade Topic 5
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Which of the following is the test for oxygen ? 1.Oxygen turns lime water milky. 2.Oxygen relights a glowing splint.. 3.Oxygen burns with a 'pop‘. 4.Oxygen extinguishes a flame. 20
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Which of the following shows the approximate composition of the air? 1.Nitrogen 10% Oxygen 90% 2.Nitrogen 20% Oxygen 80% 3.Nitrogen 90% Oxygen10% 4.Nitrogen 80% Oxygen 20% 20
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What is meant when fossil fuels are described as being finite? 1.Fossil fuels are difficult to find. 2.Fossil fuels take a long time to form. 3.Fossil fuels cannot be replaced. 4.Fossil fuels are expensive. 20
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The compounds found in crude oil and natural gas are mainly 1.hydrocarbon compounds. 2.carbohydrate compounds. 3.pure carbon. 4.sulphur containing compounds. 20
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A hydrocarbon compound contains 20 1.hydrogen, carbon and oxygen only. 2.hydrogen and carbon only. 3.hydrogen, carbon and sulphur only. 4.hydrogen, carbon, oxygen and sulphur only.
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When a hydrocarbon burns in a plentiful supply of air it forms 20 1.Carbon dioxide only. 2.Carbon dioxide and carbon monoxide. 3.Carbon monoxide and water. 4.Carbon dioxide and water.
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The process used to separate crude oil into useful components in an oil refinery is called. 20 1.Filtration. 2.Fractional distillation. 3.Evaporation. 4.Purification.
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Which of the oil fractions shown is the most viscous? 20 1.Refinery gas. 2.Kerosene. 3.Petrol. 4.Residue.
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Which of the oil fractions shown is used as diseel fuel? 20 1.Gas Oil. 2.Naphtha. 3.Petrol. 4.Kerosene.
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Identify the poisonous gas produced during the incomplete combustion of hydrocarbons. 20 1.SO 2. 2.NO 2 3.CO 4.CO 2
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