Chemistry, 2015, JAMB Exam, Exam, Paper 1 | Objectives

Paper Info

Year :

2015

Title :

Chemistry

Exam :

JAMB Exam

Paper 1 | Objectives

1 - 10 of 64 Questions

#	Question	Ans
1.	The filter in the cigarette reduce the nicotine construct by A. burning B. adsorption C. evaporation D. absorption Show Content Detailed Solution The acetate and paper modify the particulate smoke phase by particle retention (filtration), and finely divided carbon modifies the gaseous phase (adsorption) There is an explanation video available below.	B
2.	Which of these require crystallization most? A. Drug making B. Cement making C. Paint making D. Perfume making Show Content Detailed Solution There is an explanation video available below.	A
3.	Iron is often galvanized in order to A. Make it more malleable B. Remove the impurities unit C. Protect it against corrosion D. Render it passive Show Content Detailed Solution There is an explanation video available below.	C
4.	In the industrial production of H2 from water gas the CO2 produced along with the H2 is removed by A. washing under pressure B. drying over phosphorus (V) oxide C. passing the mixture to the limewater D. using ammonical copper (I) chlorine Show Content Detailed Solution Washing under pressure is an action in the industrial production of H. Options B,C,D will not yield Co and H There is an explanation video available below.	A
5.	The gas that is most useful in protecting humans against solar marathon is A. chlorine B. ozone C. carbon IV oxide D. hydrogen sulphide Show Content Detailed Solution The ozone layer or ozone shield refers to a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet (UV) radiation. It contains high concentrations of ozone (O3) relative to other parts of the atmosphere, although still very small relative to other gases in the stratosphere There is an explanation video available below.	B
6.	Vulcanization involve the removal of A. monometer B. the single bond C. the double bond D. a polymer Show Content Detailed Solution There is an explanation video available below.	C
7.	The acid in electrolysis of water is dilute A. HNO₃ B. CH₃COOH C. H₂SO₄ D. HCl Show Content Detailed Solution HeSO4 is the acid used in the electrolysis of water. Option A,B,D are concentrated acid and they will react with the water There is an explanation video available below.	C
8.	A small quantity of solid ammonium chloride (NH4Cl) heated gently in a test tube, the solid gradually disappear produce two gases. Later, a white cloudy deposit was absence on the cooler part of the test tube. The ammonium chloride is to have undergo A. distillation B. sublimation C. precipitation D. evaporation Show Content Detailed Solution Sublimation is the transformation of solid gaseous state without passing through the liquid state. Options A,C,D do not show case these character of sublimation as they do not bye pass states. They are in a particular order There is an explanation video available below.	B
9.	When salt loses its water of crystallization to the atmosphere on exposure, the process is said to be A. efflorescence B. déliquescence C. effervescence D. fluorescence Show Content Detailed Solution There is an explanation video available below.	A
10.	Atomicity of ozone is A. 1 B. 2 C. 3 D. 4 Show Content Detailed Solution There is an explanation video available below.	C

1.	The filter in the cigarette reduce the nicotine construct by A. burning B. adsorption C. evaporation D. absorption Show Content Detailed Solution The acetate and paper modify the particulate smoke phase by particle retention (filtration), and finely divided carbon modifies the gaseous phase (adsorption) There is an explanation video available below.	B
2.	Which of these require crystallization most? A. Drug making B. Cement making C. Paint making D. Perfume making Show Content Detailed Solution There is an explanation video available below.	A
3.	Iron is often galvanized in order to A. Make it more malleable B. Remove the impurities unit C. Protect it against corrosion D. Render it passive Show Content Detailed Solution There is an explanation video available below.	C
4.	In the industrial production of H2 from water gas the CO2 produced along with the H2 is removed by A. washing under pressure B. drying over phosphorus (V) oxide C. passing the mixture to the limewater D. using ammonical copper (I) chlorine Show Content Detailed Solution Washing under pressure is an action in the industrial production of H. Options B,C,D will not yield Co and H There is an explanation video available below.	A
5.	The gas that is most useful in protecting humans against solar marathon is A. chlorine B. ozone C. carbon IV oxide D. hydrogen sulphide Show Content Detailed Solution The ozone layer or ozone shield refers to a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet (UV) radiation. It contains high concentrations of ozone (O3) relative to other parts of the atmosphere, although still very small relative to other gases in the stratosphere There is an explanation video available below.	B

6.	Vulcanization involve the removal of A. monometer B. the single bond C. the double bond D. a polymer Show Content Detailed Solution There is an explanation video available below.	C
7.	The acid in electrolysis of water is dilute A. HNO₃ B. CH₃COOH C. H₂SO₄ D. HCl Show Content Detailed Solution HeSO4 is the acid used in the electrolysis of water. Option A,B,D are concentrated acid and they will react with the water There is an explanation video available below.	C
8.	A small quantity of solid ammonium chloride (NH4Cl) heated gently in a test tube, the solid gradually disappear produce two gases. Later, a white cloudy deposit was absence on the cooler part of the test tube. The ammonium chloride is to have undergo A. distillation B. sublimation C. precipitation D. evaporation Show Content Detailed Solution Sublimation is the transformation of solid gaseous state without passing through the liquid state. Options A,C,D do not show case these character of sublimation as they do not bye pass states. They are in a particular order There is an explanation video available below.	B
9.	When salt loses its water of crystallization to the atmosphere on exposure, the process is said to be A. efflorescence B. déliquescence C. effervescence D. fluorescence Show Content Detailed Solution There is an explanation video available below.	A
10.	Atomicity of ozone is A. 1 B. 2 C. 3 D. 4 Show Content Detailed Solution There is an explanation video available below.	C

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