Chemistry, 2006, JAMB Exam, Exam, Paper 1 | Objectives

Paper Info

Year :

2006

Title :

Chemistry

Exam :

JAMB Exam

Paper 1 | Objectives

11 - 20 of 49 Questions

#	Question	Ans
11.	The sulphide which is insoluble in dilute hydrochloric acid is A. FeS B. CuS C. ZnS D. Na₂S	B
12.	Which of the following typically represents a photochemical reaction? A. Formation of water from hydrogen and oxygen molecules B. Conversion of dinitrogen (IV) oxide to nitrogen (IV) oxide C. Decomposition of calcium hydroxide to its oxide D. Conversion of silver halides to grey metallic silver	D
13.	The gas obtained as a product of anaerobic action on organic matter buried in the earth is A. ethene B. methane C. carbon (IV) oxide D. nitrogen (IV) oxide	C
14.	Nigerian crude oil is described as light crude because of its A. low sulphur content B. high natural gas content C. high octane number D. low aliphatic-hydrocarbon content Show Content Detailed Solution Light crude oil is liquid petroleum that has a low density and flows freely at room temperature	A
15.	An example of aliphatic unsaturated hydrocarbon is A. pentane B. butanol C. propene D. benzene	C
16.	Which of the following has an isomer? A. C₆H₆ B. C₂H₆ C. C₄H₁₀ D. C₂H₄	C
17.	CH₃ - CH₂ - C CH The hybridization in the compound above is A. Sp² B. sp C. sp³ and sp² D. sp³ and sp	D
18.	One mole of a hydrocarbon contains 36g of carbon and its vapour density is 20. The structure of the hydrocarbon is A. CH₃C ≡ CH B. CH₃CH = CH₂ C. CH₃CH₂C ≡ CH D. CH₃CH₂ CH₃ Show Content Detailed Solution 2VD = Rmm VD = Vapour density; Rmm - Relative 2 * 20 = 40 Molecular mass Mole of carbon = 36/12 = 3 Mole of H₂ = 40 - 36 = 4 The compound contains 3 mole of carbon and 4 hydrogen	A
19.	An emulsion may be produced by shaking a detergent solution with A. palm wine B. ethanoic acid C. palm oil D. water	C
20.	The products of the combustion of candle wax are? A. hydrogen and water B. oxygen and water C. carbon (IV) oxide and water D. carbon (II) oxide and water Show Content Detailed Solution The heat of the flame vaporizes the liquid wax (turns it into a hot gas), and starts to break down the hydrocarbons into molecules of hydrogen and carbon. These vaporized molecules are drawn up into the flame, where they react with oxygen from the air to create heat, light, water vapor (H2O) and carbon dioxide (CO2).	C

11.	The sulphide which is insoluble in dilute hydrochloric acid is A. FeS B. CuS C. ZnS D. Na₂S	B
12.	Which of the following typically represents a photochemical reaction? A. Formation of water from hydrogen and oxygen molecules B. Conversion of dinitrogen (IV) oxide to nitrogen (IV) oxide C. Decomposition of calcium hydroxide to its oxide D. Conversion of silver halides to grey metallic silver	D
13.	The gas obtained as a product of anaerobic action on organic matter buried in the earth is A. ethene B. methane C. carbon (IV) oxide D. nitrogen (IV) oxide	C
14.	Nigerian crude oil is described as light crude because of its A. low sulphur content B. high natural gas content C. high octane number D. low aliphatic-hydrocarbon content Show Content Detailed Solution Light crude oil is liquid petroleum that has a low density and flows freely at room temperature	A
15.	An example of aliphatic unsaturated hydrocarbon is A. pentane B. butanol C. propene D. benzene	C

16.	Which of the following has an isomer? A. C₆H₆ B. C₂H₆ C. C₄H₁₀ D. C₂H₄	C
17.	CH₃ - CH₂ - C CH The hybridization in the compound above is A. Sp² B. sp C. sp³ and sp² D. sp³ and sp	D
18.	One mole of a hydrocarbon contains 36g of carbon and its vapour density is 20. The structure of the hydrocarbon is A. CH₃C ≡ CH B. CH₃CH = CH₂ C. CH₃CH₂C ≡ CH D. CH₃CH₂ CH₃ Show Content Detailed Solution 2VD = Rmm VD = Vapour density; Rmm - Relative 2 * 20 = 40 Molecular mass Mole of carbon = 36/12 = 3 Mole of H₂ = 40 - 36 = 4 The compound contains 3 mole of carbon and 4 hydrogen	A
19.	An emulsion may be produced by shaking a detergent solution with A. palm wine B. ethanoic acid C. palm oil D. water	C
20.	The products of the combustion of candle wax are? A. hydrogen and water B. oxygen and water C. carbon (IV) oxide and water D. carbon (II) oxide and water Show Content Detailed Solution The heat of the flame vaporizes the liquid wax (turns it into a hot gas), and starts to break down the hydrocarbons into molecules of hydrogen and carbon. These vaporized molecules are drawn up into the flame, where they react with oxygen from the air to create heat, light, water vapor (H2O) and carbon dioxide (CO2).	C