Chemistry, 2013, WASSCE/WAEC MAY/JUNE, Exam, Paper 1 | Objectives

Paper Info

Year :

2013

Title :

Chemistry

Exam :

WASSCE/WAEC MAY/JUNE

Paper 1 | Objectives

31 - 40 of 47 Questions

#	Question	Ans
31.	A substance is said to be impure if A. its melting point range is wide B. it dissolves in water with difficult C. it has a low melting point D. it is coloured	A
32.	The following factors affect the solubility of a solid in a given solvent except A. nature of solute B. nature of solvent C. pressure D. temperature	C
33.	Consider the reaction represented by the equation: N₂O_4(g) ⇌ 2NO_2(g) ; ∆H = + x kJmol^-1 What happens when the temperature is reduced at equilibrium? A. Concentration of N ₂O_4(g) decreases B. Concentration of N ₂O_4(g) increases. C. Pressure exerted by the gases increases D. Pressure exerted by the gases remains constant	B
34.	Which of the following cells produce electrical energy from chemical reactions? l. Lead-acid battery ll. Dry cell III. Deniell cell IV Electrolytic cell A. l and ll only B. l, ll, and III only C. lll and IV only D. I and III only	B
35.	Consider the redox reaction as represented by the following equation: 1_2(aq) + 2S₂O₃^2-_(aq) → 21^-_(aq) + S₄O₆^2-_(aq). Which of the species in the equation is reduced? A. S₄O₆^2-_(aq) B. S₄O₃^2-_(aq) C. 1_2(aq) D. 1^-_(aq)	C
36.	The separation of petroleum fractions depends on the differences in their A. melting points B. molar masses C. solubilities D. boiling points	D
37.	The major product formed by the reaction between ethanoic acid and aqueous sodium hydroxide is A. soap B. sodium ethanoate C. sodium methoxide D. water	B
38.	Which of the following organic compounds would decolourize bromie water? A. Benzene B. Cyclobutane C. Hexane D. Pentane	A
39.	How many isomers has C ₃H ₆CI ₂? A. 2 B. 3 C. 4 D. 5	A
40.	Which of the following reactions is common to all hydrocarbones? A. Combustion B. Addition C. Polymerization D. Condensation	A

31.	A substance is said to be impure if A. its melting point range is wide B. it dissolves in water with difficult C. it has a low melting point D. it is coloured	A
32.	The following factors affect the solubility of a solid in a given solvent except A. nature of solute B. nature of solvent C. pressure D. temperature	C
33.	Consider the reaction represented by the equation: N₂O_4(g) ⇌ 2NO_2(g) ; ∆H = + x kJmol^-1 What happens when the temperature is reduced at equilibrium? A. Concentration of N ₂O_4(g) decreases B. Concentration of N ₂O_4(g) increases. C. Pressure exerted by the gases increases D. Pressure exerted by the gases remains constant	B
34.	Which of the following cells produce electrical energy from chemical reactions? l. Lead-acid battery ll. Dry cell III. Deniell cell IV Electrolytic cell A. l and ll only B. l, ll, and III only C. lll and IV only D. I and III only	B
35.	Consider the redox reaction as represented by the following equation: 1_2(aq) + 2S₂O₃^2-_(aq) → 21^-_(aq) + S₄O₆^2-_(aq). Which of the species in the equation is reduced? A. S₄O₆^2-_(aq) B. S₄O₃^2-_(aq) C. 1_2(aq) D. 1^-_(aq)	C

36.	The separation of petroleum fractions depends on the differences in their A. melting points B. molar masses C. solubilities D. boiling points	D
37.	The major product formed by the reaction between ethanoic acid and aqueous sodium hydroxide is A. soap B. sodium ethanoate C. sodium methoxide D. water	B
38.	Which of the following organic compounds would decolourize bromie water? A. Benzene B. Cyclobutane C. Hexane D. Pentane	A
39.	How many isomers has C ₃H ₆CI ₂? A. 2 B. 3 C. 4 D. 5	A
40.	Which of the following reactions is common to all hydrocarbones? A. Combustion B. Addition C. Polymerization D. Condensation	A