Chemistry, 1982, JAMB Exam, Exam, Paper 1 | Objectives

Paper Info

Year :

1982

Title :

Chemistry

Exam :

JAMB Exam

Paper 1 | Objectives

11 - 20 of 49 Questions

#	Question	Ans
11.	Which of the following CANNOT be obtained by fractional distillation of petroleum? A. Ether B. Methane C. Butane D. Ethene E. Hydrogen	E
12.	In the reaction N2(g) + O(g) ↔ 2NO(g) produced i an increase in the total pressure will? A. cause less nitrogen to be produced in the equilibrium mixture B. cause less nitric oxide to be produced in the equilibrium mixture C. cause more nitric oxide to be produced in the equilibrium mixture D. cause more oxygen to be produced in the equilibrium mixture E. have no effect Show Content Detailed Solution If the pressure is increased, the position of equilibrium. moves in the direction of the fewest moles. of gas However, because there is an equal number of particles on both sides, change in pressure will have no effect on the system.	E
13.	In the chemical reaction A + B \(\to\) C + D, more of D is formed? A. if the concentrated of A is reduced B. if the concentrated of B is reduced C. if the concentrated of C is reduced D. if the concentration of C is increased E. if D is continuously removed from the reaction mixture	E
14.	1.00 g of the oxide of metal X (atomic mass = 64) gave 0.80 g of the metal when reduced with hydrogen. The formula of the oxide is? A. X₂O B. XO C. XO₂ D. X₂O₃ E. X₃O₄	B
15.	When a solution of silver (l) nitrate is saturated with hydrogen sulphide, a black precipitate forms which is? A. H₂S B. Ag₂S C. PbS D. HNO₃ E. S	B
16.	The production of ammonia by the haber process may be represented by the equilibrium equation N₂(g) + 3H₂(g) ↔ 2NH₃ ∆H = -22KJ. Therefore the production of ammonia will be favoured by? A. only high pressure B. only high temperature C. a combination of high temperature and low pressure D. a combination of low temperature and high pressure E. low pressure	D
17.	Which of the following represents ethyl ethanonate? A. CH₃CH₂CO₂CH₃ B. (CH₃CO₂)₂O C. CH₃CH₂CO₂CH₂CH₃ D. CH₃CO₂CH₂CH₃ E. CH₃CH₂COCH₂CH₃	D
18.	Which of the following equations represents an oxidizing action of sulphur dioxide? A. SO₂ + 2HNO₂ → H₂SO₄ + 2NO₂ + heat B. 2SO₂ + 2H₂O + O₂ → 2H₂SO₄ C. SO₂ + 2H₂O + CI₂ → H₂SO₄ + 2HCI D. SO₂ + 2H₂S → 3S + 2H₂O E. K₂Cr₂O₇ + H₂SO₄ + 3SO₂ → K₂SO₄ + Cr₂(SO₄)₃ + H₂O	D
19.	If the rate of diffusion of oxygen gas is taken as 1, what will be rated of diffusion of methane whose relative molar mass is 16? A. 2.0 B. 1.8 C. 1.4 D. 1.0 E. 0.5	C
20.	If the temperature of a gas is increased? A. the kinetic energy of the emolecules will decrease B. the pressure will decrease if the volume is constant C. the gas will occupy a greater volume if the pressure is constant D. the mass of the gas will decrease E. the pressure and volume will increase	C

11.	Which of the following CANNOT be obtained by fractional distillation of petroleum? A. Ether B. Methane C. Butane D. Ethene E. Hydrogen	E
12.	In the reaction N2(g) + O(g) ↔ 2NO(g) produced i an increase in the total pressure will? A. cause less nitrogen to be produced in the equilibrium mixture B. cause less nitric oxide to be produced in the equilibrium mixture C. cause more nitric oxide to be produced in the equilibrium mixture D. cause more oxygen to be produced in the equilibrium mixture E. have no effect Show Content Detailed Solution If the pressure is increased, the position of equilibrium. moves in the direction of the fewest moles. of gas However, because there is an equal number of particles on both sides, change in pressure will have no effect on the system.	E
13.	In the chemical reaction A + B \(\to\) C + D, more of D is formed? A. if the concentrated of A is reduced B. if the concentrated of B is reduced C. if the concentrated of C is reduced D. if the concentration of C is increased E. if D is continuously removed from the reaction mixture	E
14.	1.00 g of the oxide of metal X (atomic mass = 64) gave 0.80 g of the metal when reduced with hydrogen. The formula of the oxide is? A. X₂O B. XO C. XO₂ D. X₂O₃ E. X₃O₄	B
15.	When a solution of silver (l) nitrate is saturated with hydrogen sulphide, a black precipitate forms which is? A. H₂S B. Ag₂S C. PbS D. HNO₃ E. S	B

16.	The production of ammonia by the haber process may be represented by the equilibrium equation N₂(g) + 3H₂(g) ↔ 2NH₃ ∆H = -22KJ. Therefore the production of ammonia will be favoured by? A. only high pressure B. only high temperature C. a combination of high temperature and low pressure D. a combination of low temperature and high pressure E. low pressure	D
17.	Which of the following represents ethyl ethanonate? A. CH₃CH₂CO₂CH₃ B. (CH₃CO₂)₂O C. CH₃CH₂CO₂CH₂CH₃ D. CH₃CO₂CH₂CH₃ E. CH₃CH₂COCH₂CH₃	D
18.	Which of the following equations represents an oxidizing action of sulphur dioxide? A. SO₂ + 2HNO₂ → H₂SO₄ + 2NO₂ + heat B. 2SO₂ + 2H₂O + O₂ → 2H₂SO₄ C. SO₂ + 2H₂O + CI₂ → H₂SO₄ + 2HCI D. SO₂ + 2H₂S → 3S + 2H₂O E. K₂Cr₂O₇ + H₂SO₄ + 3SO₂ → K₂SO₄ + Cr₂(SO₄)₃ + H₂O	D
19.	If the rate of diffusion of oxygen gas is taken as 1, what will be rated of diffusion of methane whose relative molar mass is 16? A. 2.0 B. 1.8 C. 1.4 D. 1.0 E. 0.5	C
20.	If the temperature of a gas is increased? A. the kinetic energy of the emolecules will decrease B. the pressure will decrease if the volume is constant C. the gas will occupy a greater volume if the pressure is constant D. the mass of the gas will decrease E. the pressure and volume will increase	C