Chemistry, 2010, JAMB Exam, Exam, Paper 1 | Objectives

Paper Info

Year :

2010

Title :

Chemistry

Exam :

JAMB Exam

Paper 1 | Objectives

41 - 49 of 49 Questions

#	Question	Ans
41.	Which of the following is used to hasten the ripening of fruit? A. Ethene B. Ethanol C. Ethyne D. Ethane Show Content Detailed Solution Ethylene is a plant hormone produced during fruit ripening which mobilizes the genes to synthesize the enzymes which are responsible for fruit ripening. There is an explanation video available below.	A
42.	The final products of the reaction between methane and chlorine in the presence of ultraviolet light are hydrogen chloride and? A. tricloromethane B. dichloromethane C. tetrachloromethane D. chloromethane Show Content Detailed Solution Carbon tetrachloride ( IUPAC: Tetrachloromethane) CCl\(_4\), is the final product obtained in this substitution reaction. There is an explanation video available below.	C
43.	The correct order of increasing boiling points of the following compounds C3H7OH, C7H16 and C4H10 is? A. C₃H₇OH → C₄H₁₀ → C₇H₁₀ B. C₄H₁₀ → C₇H₁₆ → C₃H₇OH C. C₇H₁₆ → C₃H₇OH → C₄H₁₀ D. C₄H₁₀ → C₃H₇OH → C₇H₁₆ Show Content Detailed Solution C3H7OH ( PROPANOL) ⇒ 97ºC C7H16 ( HEPTANE ) ⇒ 98.42ºC ;and C4H10 ( BUTANE ) ⇒ -1ºC There is an explanation video available below.	D
44.	One of the major uses of alkane is? A. as domestic and industrial fuel B. in the hydrogenation of oils C. in the textile industries D. in the production of plastics Show Content Detailed Solution - Alkanes will react with Oxygen if they are given sufficient Activation Energy. This will result in a highly Exothermic reaction, producing Carbon Dioxide and Water, which makes Alkanes very useful as fuels. There is an explanation video available below.	A
45.	The haloalkanes used in dry-cleaning industries are? A. trichloromethane and tetrachloromethane B. chloroethene and dichloroethene C. trichloroethene and tetrachloroethene D. chloroethane and dichloroethene Show Content Detailed Solution - Both trichloromethane and tetrachloromethane are such important organic solvent. There is an explanation video available below.	A
46.	Two hydrocarbons X and Y were treated with bromine water. X decolorised the solution and Y did not not. Which class of compound does Y belong? A. Benzene B. Alkynes C. Alkenes D. Alkanes Show Content Detailed Solution Bromine water is an orange solution of bromine. It becomes colorless when it is shaken with an alkene. Alkenes can decolorize bromine water, but alkanes cannot. X is ethene which decolorizes bromine water showing that ethene is unsaturated. Y is an alkane. There is an explanation video available below.	D
47.	The compound that is used as an anesthetic is? A. CCl₄ B. CH Cl₃ C. CH₂Cl₂ D. CH₃Cl Show Content Detailed Solution - Chloroform / tricholoromethane ( CHCl\(_3\) ) is a potent anaesthetic agent. - Though Chloroform is no longer used as an anaesthetic for several reasons, the most important of which is the relatively high risk of complications, including possible heart failure There is an explanation video available below.	B
48.	In the diagram above, the purpose of the asbestos to? A. absorb impurities B. catalyze the reaction C. solidify the gas D. dry the gas Show Content Detailed Solution Catalyst like platinize asbestos or vanadium(v)oxide is required to speed up the combination to form sulphur(iv)oxide. There is an explanation video available below.	B
49.	In the diagram above, the gas produced is? A. NO B. NO₂ C. N₂O D. N₂O₄ Show Content Detailed Solution In this laboratory preparation, 50% trioxonitrate (V) acid is reacted with copper turnings to liberate nitrogen (II) oxide ( NO ) that is collected by downward delivery. There is an explanation video available below.	A

41.	Which of the following is used to hasten the ripening of fruit? A. Ethene B. Ethanol C. Ethyne D. Ethane Show Content Detailed Solution Ethylene is a plant hormone produced during fruit ripening which mobilizes the genes to synthesize the enzymes which are responsible for fruit ripening. There is an explanation video available below.	A
42.	The final products of the reaction between methane and chlorine in the presence of ultraviolet light are hydrogen chloride and? A. tricloromethane B. dichloromethane C. tetrachloromethane D. chloromethane Show Content Detailed Solution Carbon tetrachloride ( IUPAC: Tetrachloromethane) CCl\(_4\), is the final product obtained in this substitution reaction. There is an explanation video available below.	C
43.	The correct order of increasing boiling points of the following compounds C3H7OH, C7H16 and C4H10 is? A. C₃H₇OH → C₄H₁₀ → C₇H₁₀ B. C₄H₁₀ → C₇H₁₆ → C₃H₇OH C. C₇H₁₆ → C₃H₇OH → C₄H₁₀ D. C₄H₁₀ → C₃H₇OH → C₇H₁₆ Show Content Detailed Solution C3H7OH ( PROPANOL) ⇒ 97ºC C7H16 ( HEPTANE ) ⇒ 98.42ºC ;and C4H10 ( BUTANE ) ⇒ -1ºC There is an explanation video available below.	D
44.	One of the major uses of alkane is? A. as domestic and industrial fuel B. in the hydrogenation of oils C. in the textile industries D. in the production of plastics Show Content Detailed Solution - Alkanes will react with Oxygen if they are given sufficient Activation Energy. This will result in a highly Exothermic reaction, producing Carbon Dioxide and Water, which makes Alkanes very useful as fuels. There is an explanation video available below.	A
45.	The haloalkanes used in dry-cleaning industries are? A. trichloromethane and tetrachloromethane B. chloroethene and dichloroethene C. trichloroethene and tetrachloroethene D. chloroethane and dichloroethene Show Content Detailed Solution - Both trichloromethane and tetrachloromethane are such important organic solvent. There is an explanation video available below.	A

46.	Two hydrocarbons X and Y were treated with bromine water. X decolorised the solution and Y did not not. Which class of compound does Y belong? A. Benzene B. Alkynes C. Alkenes D. Alkanes Show Content Detailed Solution Bromine water is an orange solution of bromine. It becomes colorless when it is shaken with an alkene. Alkenes can decolorize bromine water, but alkanes cannot. X is ethene which decolorizes bromine water showing that ethene is unsaturated. Y is an alkane. There is an explanation video available below.	D
47.	The compound that is used as an anesthetic is? A. CCl₄ B. CH Cl₃ C. CH₂Cl₂ D. CH₃Cl Show Content Detailed Solution - Chloroform / tricholoromethane ( CHCl\(_3\) ) is a potent anaesthetic agent. - Though Chloroform is no longer used as an anaesthetic for several reasons, the most important of which is the relatively high risk of complications, including possible heart failure There is an explanation video available below.	B
48.	In the diagram above, the purpose of the asbestos to? A. absorb impurities B. catalyze the reaction C. solidify the gas D. dry the gas Show Content Detailed Solution Catalyst like platinize asbestos or vanadium(v)oxide is required to speed up the combination to form sulphur(iv)oxide. There is an explanation video available below.	B
49.	In the diagram above, the gas produced is? A. NO B. NO₂ C. N₂O D. N₂O₄ Show Content Detailed Solution In this laboratory preparation, 50% trioxonitrate (V) acid is reacted with copper turnings to liberate nitrogen (II) oxide ( NO ) that is collected by downward delivery. There is an explanation video available below.	A