1981 JAMB UTME Chemistry Past Questions

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1981

In the preparation of ammonia, which of the following is used as the drying agent?

1981

In the reaction of oxygen with hydrogen to produce water, which of the following statements is true?

1981

If an organic compound decolorizes bromine water then the compound is?

1981

When sodium nitrate dissolves in water, ∆H is positive. This means that?

1981

Na2CO3 + 2HCI → 2NaCI + H2O + CO2. Using the above equation, what volume of carbondioxide, measured at s.t.p is liberated when 53g of sodium carbonate is dissolved in hydrochloric acid?(1 mole of gas occupies 22.4 dm3 at…

1981

If 48,000 coulombs of electricity are required to discharge 0.5 mole of sodium from a molten sodium chloride mass, then the number of coulombs required to discharge 2 moles of lead from molten lead (ll) chloride is?

1981

28.8 cm3 of nitrogen at 15°C is cooled to O°C at constant pressure, the new volume of nitrogen is?

1981

Which of the following statements about phosphorus is NOT correct?

1981

Fats and oils are?

1981

When air is compressed?

1981

5cm3 of a saturated solution of sodium chloride at 30°C gave, on careful evaporation, 1.95g of solid salt. The solubility of sodium chloride at 30°C?(Na = 23, Cl = 35.5)

1981

The electronic configuration of elements X and Y are X = 2, 8, 6; Y = 2, 8, 7. The bond in the compound formed by X and Y is expected to be?

1981

Which of the following is NOT a true statement of the kinetic Theory of Gases?

1981

The products of the reaction between dilute sulphuric acid and sodium thiosulphate crystals are?

1981

The following compounds are given with their corresponding boiling points.Compound Boiling Point i.................................14°C ii................................24°C iii................................0°C iv…

1981

When hydrogen sulphide and sulphur dioxide are each passed in turn into a solution of potassium dichromate?

1981

Which of the following compounds and elements would sublime on exposure to the atmosphere?

1981

What mass of sodium carbonate solution is in 500 cm3 of 0.1 molar sodium carbonate solution?(Na = 23, C = 12, O = 16)

1981

Pure sulphuric acid is a liquid of 1:84 density. What volume of it would be required to prepare 250 cm3 of 2.0 M solution?(H = 1, S = 32, O = 16)

1981

In the extraction of iron, which of the following reactions does NOT take place in the blast furnace?

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