Chemistry, 2019, JAMB Exam, Exam, Paper 1 | Objectives

Paper Info

Year :

2019

Title :

Chemistry

Exam :

JAMB Exam

Paper 1 | Objectives

11 - 20 of 80 Questions

#	Question	Ans
11.	Which of the following metals is the most essential in the regulation of blood volume, blood pressure and osmotic equilibrium? A. Zinc B. Manganese C. Sodium D. Iron Show Content Detailed Solution There is an explanation video available below.	C
12.	Which of the following alkaline earth metals react more spontaneously with water? A. Calcium B. Beryllium C. Magnesium D. Strontium Show Content Detailed Solution The Group 2 metals become more reactive towards water as you go down the Group. There is an explanation video available below.	D
13.	When chlorine water is exposed to bright sunlight, the following products are formed A. HCl\(_{(aq)}\) and Cl\(_2\) B. HOCl\(_{(aq)}\) and Cl\(_2\) C. HCl\(_{(aq)}\) and O\(_2\) D. HOCl\(_{(aq)}\) and O\(_2\) Show Content Detailed Solution There is an explanation video available below.	C
14.	Which process(es) is/are involved in the turning of starch iodide paper blue-black by chlorine gas? A. chlorine attacks the starch to give the blue-black color B. chlorine attacks the iodide ion to give the blue-black color C. chlorine oxidizes the iodide ion to produce iodine which attacks the starch to give the blue-black color D. iodine attacks the starch to give the blue-black color Show Content Detailed Solution There is an explanation video available below.	C
15.	Which of the following is a set of neutral oxides? A. N\(_2\)O, H\(_2\)O, CO B. N\(_2\)O, SO\(_2\), CO C. N\(_2\)O, Na\(_2\)O, ZnO D. N\(_2\)O, SO\(_3\), NO Show Content Detailed Solution There is an explanation video available below.	A
16.	SO\(_3\) is not directly dissolved in water in the industrial preparation of H\(_2\)SO\(_4\) by the contact process because A. SO\(_3\) is an acidic gas B. Acid is usually added to water and not water to acid C. The reaction between SO\(_3\) and water is violently exothermic D. SO\(_3\) does not dissolve readily in water Show Content Detailed Solution There is an explanation video available below.	C
17.	Which of the following statements does not show Rutherford's account of Nuclear Theory? An atom contains a region A. which contains protons and neutrons B. which is positively charged C. which is massive and can cause deflection of a few projectiles D. which is very large and in which close to 98% of projectiles pass undeflected Show Content Detailed Solution Rutherford's account of Nuclear theory does not include the fact that atoms contain a massive region and cause deflection of from projectiles. There is an explanation video available below.	C
18.	Elements X and Y have electronic configurations 1s\(^2\)2s\(^2\)2p\(^4\) and 1s\(^2\)2s\(^2\)2p\(^6\)3s\(^2\)3p\(^1\) respectively. When they combine, the formula of the compound formed is A. XY B. X\(_2\)Y C. Y\(_2\)X\(_3\) D. X\(_2\)Y\(_3\) Show Content Detailed Solution There is an explanation video available below.	C
19.	By what amount must the temperature of 200cm\(^3\) of Nitrogen at 27°C be increased to double the pressure if the final volume is 150cm\(^3\) (Assume ideality) A. 150°C B. 177°C C. 75°C D. 120°C Show Content Detailed Solution Parameters given: V\(_1\) = 200 cm\(^3\); T\(_1\) = 27 + 273 = 300K. V\(_2\) = 150 cm\(^3\); T\(_2\) = ? P\(_2\) = 2P\(_1\). Using the Ideal Gas Equation: \(\frac{P_1 V_1}{T_1} = \frac{P_2 V_2}{T_2}\) \(\frac{P_1 \times 200}{300} = \frac{2P_1 \times 150}{T_2}\) \(\frac{2}{3} = \frac{300}{T_2}\) T\(_2\) = 450K. = 450K - 273K = 177°C 177 - 27 = 150 That is the amount by which T1 must be increased. There is an explanation video available below.	A
20.	The combustion of carbon(ii)oxide in oxygen can be represented by equation. 2CO + O\(_2\) → 2CO\(_2\) Calculate the volume of the resulting mixture at the end of the reaction if 50cm\(_3\) of carbon(ii)oxide was exploded in 100cm\(_3\) of oxygen A. 75cm\(^3\) B. 125cm\(^3\) C. 100cm\(^3\) D. 50cm\(^3\) Show Content Detailed Solution There is an explanation video available below.	B

11.	Which of the following metals is the most essential in the regulation of blood volume, blood pressure and osmotic equilibrium? A. Zinc B. Manganese C. Sodium D. Iron Show Content Detailed Solution There is an explanation video available below.	C
12.	Which of the following alkaline earth metals react more spontaneously with water? A. Calcium B. Beryllium C. Magnesium D. Strontium Show Content Detailed Solution The Group 2 metals become more reactive towards water as you go down the Group. There is an explanation video available below.	D
13.	When chlorine water is exposed to bright sunlight, the following products are formed A. HCl\(_{(aq)}\) and Cl\(_2\) B. HOCl\(_{(aq)}\) and Cl\(_2\) C. HCl\(_{(aq)}\) and O\(_2\) D. HOCl\(_{(aq)}\) and O\(_2\) Show Content Detailed Solution There is an explanation video available below.	C
14.	Which process(es) is/are involved in the turning of starch iodide paper blue-black by chlorine gas? A. chlorine attacks the starch to give the blue-black color B. chlorine attacks the iodide ion to give the blue-black color C. chlorine oxidizes the iodide ion to produce iodine which attacks the starch to give the blue-black color D. iodine attacks the starch to give the blue-black color Show Content Detailed Solution There is an explanation video available below.	C
15.	Which of the following is a set of neutral oxides? A. N\(_2\)O, H\(_2\)O, CO B. N\(_2\)O, SO\(_2\), CO C. N\(_2\)O, Na\(_2\)O, ZnO D. N\(_2\)O, SO\(_3\), NO Show Content Detailed Solution There is an explanation video available below.	A

16.	SO\(_3\) is not directly dissolved in water in the industrial preparation of H\(_2\)SO\(_4\) by the contact process because A. SO\(_3\) is an acidic gas B. Acid is usually added to water and not water to acid C. The reaction between SO\(_3\) and water is violently exothermic D. SO\(_3\) does not dissolve readily in water Show Content Detailed Solution There is an explanation video available below.	C
17.	Which of the following statements does not show Rutherford's account of Nuclear Theory? An atom contains a region A. which contains protons and neutrons B. which is positively charged C. which is massive and can cause deflection of a few projectiles D. which is very large and in which close to 98% of projectiles pass undeflected Show Content Detailed Solution Rutherford's account of Nuclear theory does not include the fact that atoms contain a massive region and cause deflection of from projectiles. There is an explanation video available below.	C
18.	Elements X and Y have electronic configurations 1s\(^2\)2s\(^2\)2p\(^4\) and 1s\(^2\)2s\(^2\)2p\(^6\)3s\(^2\)3p\(^1\) respectively. When they combine, the formula of the compound formed is A. XY B. X\(_2\)Y C. Y\(_2\)X\(_3\) D. X\(_2\)Y\(_3\) Show Content Detailed Solution There is an explanation video available below.	C
19.	By what amount must the temperature of 200cm\(^3\) of Nitrogen at 27°C be increased to double the pressure if the final volume is 150cm\(^3\) (Assume ideality) A. 150°C B. 177°C C. 75°C D. 120°C Show Content Detailed Solution Parameters given: V\(_1\) = 200 cm\(^3\); T\(_1\) = 27 + 273 = 300K. V\(_2\) = 150 cm\(^3\); T\(_2\) = ? P\(_2\) = 2P\(_1\). Using the Ideal Gas Equation: \(\frac{P_1 V_1}{T_1} = \frac{P_2 V_2}{T_2}\) \(\frac{P_1 \times 200}{300} = \frac{2P_1 \times 150}{T_2}\) \(\frac{2}{3} = \frac{300}{T_2}\) T\(_2\) = 450K. = 450K - 273K = 177°C 177 - 27 = 150 That is the amount by which T1 must be increased. There is an explanation video available below.	A
20.	The combustion of carbon(ii)oxide in oxygen can be represented by equation. 2CO + O\(_2\) → 2CO\(_2\) Calculate the volume of the resulting mixture at the end of the reaction if 50cm\(_3\) of carbon(ii)oxide was exploded in 100cm\(_3\) of oxygen A. 75cm\(^3\) B. 125cm\(^3\) C. 100cm\(^3\) D. 50cm\(^3\) Show Content Detailed Solution There is an explanation video available below.	B

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