Year :
2009
Title :
Chemistry
Exam :
WASSCE/WAEC MAY/JUNE
Paper 1 | Objectives
31 - 40 of 53 Questions
| # | Question | Ans |
|---|---|---|
| 31. |
Which of the following salts is insoluble in water? A. Pb (NO3)2 B. Na 2CO3 C. AgNO3 D. AgCI. |
D |
| 32. |
Which of the following statement is correct? The solubility of A. gases increases with increase in temperature B. gases decreases with increase in temperature C. most solid solutes decreases with indease in temperature D. most solid solutes is constant |
B |
| 33. |
A catalyst increases the rate of chemical reaction by A. decreasing the temperature of the reaction B. decreasing the activation energy of the reaction C. increasing the surface area of the reactants D. decreasing the surface area of the products |
B |
| 34. |
Which of the following factors will affect the rate of the reaction represented by the equation? 2HCI(aq) + CaCO 3(s) → CaCI2(aq) + H2O (I) + CO2(g) l. Pressure ll. Concentration III. Nature of reactants IV. Temperature A. l and ll only B. ll, lll and IV only C. l, ll and lll only D. l, ll, lll and IV |
B |
| 35. |
Which of the following substances is the anode in the dry Leclanche cell ? A. Carbon rod B. Muslin bag C. The seal D. Zinc container Detailed SolutionIn a Leclanche cell, the anode is a zinc rod / container and the cathode is a carbon rod with ammonium chloride solution / paste as the electrolyte. |
|
| 36. |
Consider the reaction represented by the equation: 2H2SO 4(aq0 + C(s) → 2H2O(l) + 2SO2(g) + CO 2(g) H2SO 4 is acting as A. a catalyst B. an oxidizing agent C. a reducing agent D. a sulphonating agent |
B |
| 37. |
Which of the following oxides of nitrogen has oxidation number of + 1? A. KNO3 B. N2O C. N2O3 D. NO |
B |
| 38. |
The separation of petroleum fractions depends on the differences in their A. boiling points B. molar masses C. melting point D. solubilities |
A |
| 39. |
Which of the following raw materials is used in the plastic industry ? A. Calcium B. Ethene C. Hydrogen D. Methane |
B |
| 40. |
The product of the reaction between C 2H5OH and concentrated H2SO 4 at 170oC is A. (C2H5)2SO4 B. CH 3CH 2HSO 4 C. (C2H5)2O D. CH2 = CH 2 |
D |
| 31. |
Which of the following salts is insoluble in water? A. Pb (NO3)2 B. Na 2CO3 C. AgNO3 D. AgCI. |
D |
| 32. |
Which of the following statement is correct? The solubility of A. gases increases with increase in temperature B. gases decreases with increase in temperature C. most solid solutes decreases with indease in temperature D. most solid solutes is constant |
B |
| 33. |
A catalyst increases the rate of chemical reaction by A. decreasing the temperature of the reaction B. decreasing the activation energy of the reaction C. increasing the surface area of the reactants D. decreasing the surface area of the products |
B |
| 34. |
Which of the following factors will affect the rate of the reaction represented by the equation? 2HCI(aq) + CaCO 3(s) → CaCI2(aq) + H2O (I) + CO2(g) l. Pressure ll. Concentration III. Nature of reactants IV. Temperature A. l and ll only B. ll, lll and IV only C. l, ll and lll only D. l, ll, lll and IV |
B |
| 35. |
Which of the following substances is the anode in the dry Leclanche cell ? A. Carbon rod B. Muslin bag C. The seal D. Zinc container Detailed SolutionIn a Leclanche cell, the anode is a zinc rod / container and the cathode is a carbon rod with ammonium chloride solution / paste as the electrolyte. |
| 36. |
Consider the reaction represented by the equation: 2H2SO 4(aq0 + C(s) → 2H2O(l) + 2SO2(g) + CO 2(g) H2SO 4 is acting as A. a catalyst B. an oxidizing agent C. a reducing agent D. a sulphonating agent |
B |
| 37. |
Which of the following oxides of nitrogen has oxidation number of + 1? A. KNO3 B. N2O C. N2O3 D. NO |
B |
| 38. |
The separation of petroleum fractions depends on the differences in their A. boiling points B. molar masses C. melting point D. solubilities |
A |
| 39. |
Which of the following raw materials is used in the plastic industry ? A. Calcium B. Ethene C. Hydrogen D. Methane |
B |
| 40. |
The product of the reaction between C 2H5OH and concentrated H2SO 4 at 170oC is A. (C2H5)2SO4 B. CH 3CH 2HSO 4 C. (C2H5)2O D. CH2 = CH 2 |
D |