Chemistry, 2015, WASSCE/WAEC MAY/JUNE, Exam, Paper 1 | Objectives

Paper Info

Year :

2015

Title :

Chemistry

Exam :

WASSCE/WAEC MAY/JUNE

Paper 1 | Objectives

31 - 40 of 50 Questions

#	Question	Ans
31.	Solubility is practically applied in A. Fractional distillation B. The determination of pH C. The determination of saturation in hydrocarbons D. Solvent extraction	D
32.	Which of the following compounds is the least soluble in water? A. CaCl₂ B. CaSO₄ C. NaCl D. Na₂SO₄	B
33.	A substance which dissolves readily in organic solvent would A. Be a covalent compound B. Have strong electrostatic forces of attraction C. have a high melting point D. Conduct electricity in molten state	A
34.	A change in the temperature of a saturated solution disturbs the equilibrium between the A. Undissolved solute and the solvent B. Dissolved solute and the solvent C. Dissolved solute and the undissolved solute D. Dissolved solute and the solution	C
35.	Which of the following statements about an electrochemical cell is correct? Oxidation occurs A. At the anode B. At the cathode C. Through the salt bridge D. In the aqueous solution	A
36.	Consider the following reaction equation: CuO_(s) + H_2(g) \(\to\) Cu_(s) + H₂O₍₁₎ Which substance is oxidized? A. Cu B. CuO C. H₂ D. H₂O	C
37.	Which of the following metals is the strongest reducing agent? A. Sodium B. Silver C. Potassium D. Copper	C
38.	The complete hydrogenation of benzene gives A. Cyclohexene B. Cyclohexane C. Hexene D. Hexane	B
39.	A compound has an empirical formular CH₂O and molecular mass of 90. [H = 1.00, C = 12.0, O = 16.0] A. C4H10O2 B. C3H10O2 C. C3H6O3 D. C2H2O4 Show Content Detailed Solution (CH₂O)n = 90; (12 + (1 x 2) + 16)n = 90 (12 + 2 + 16)n = 90; 30n = 90; n = \(\frac{90}{30}\); n = 3 (CH₂O)₃ = Molecular formula ; = C₃H₆O₃	C
40.	Which of the following reactions would take place when concentrated sodium hydroxide solution is added to palm oil? A. Esterification B. Neutralization C. Polymerization D. Saponification	D

31.	Solubility is practically applied in A. Fractional distillation B. The determination of pH C. The determination of saturation in hydrocarbons D. Solvent extraction	D
32.	Which of the following compounds is the least soluble in water? A. CaCl₂ B. CaSO₄ C. NaCl D. Na₂SO₄	B
33.	A substance which dissolves readily in organic solvent would A. Be a covalent compound B. Have strong electrostatic forces of attraction C. have a high melting point D. Conduct electricity in molten state	A
34.	A change in the temperature of a saturated solution disturbs the equilibrium between the A. Undissolved solute and the solvent B. Dissolved solute and the solvent C. Dissolved solute and the undissolved solute D. Dissolved solute and the solution	C
35.	Which of the following statements about an electrochemical cell is correct? Oxidation occurs A. At the anode B. At the cathode C. Through the salt bridge D. In the aqueous solution	A

36.	Consider the following reaction equation: CuO_(s) + H_2(g) \(\to\) Cu_(s) + H₂O₍₁₎ Which substance is oxidized? A. Cu B. CuO C. H₂ D. H₂O	C
37.	Which of the following metals is the strongest reducing agent? A. Sodium B. Silver C. Potassium D. Copper	C
38.	The complete hydrogenation of benzene gives A. Cyclohexene B. Cyclohexane C. Hexene D. Hexane	B
39.	A compound has an empirical formular CH₂O and molecular mass of 90. [H = 1.00, C = 12.0, O = 16.0] A. C4H10O2 B. C3H10O2 C. C3H6O3 D. C2H2O4 Show Content Detailed Solution (CH₂O)n = 90; (12 + (1 x 2) + 16)n = 90 (12 + 2 + 16)n = 90; 30n = 90; n = \(\frac{90}{30}\); n = 3 (CH₂O)₃ = Molecular formula ; = C₃H₆O₃	C
40.	Which of the following reactions would take place when concentrated sodium hydroxide solution is added to palm oil? A. Esterification B. Neutralization C. Polymerization D. Saponification	D