Year :
2004
Title :
Chemistry
Exam :
WASSCE/WAEC MAY/JUNE
Paper 1 | Objectives
31 - 40 of 42 Questions
| # | Question | Ans |
|---|---|---|
| 31. |
When ammonium trioxocarbonate (IV) solution is added to separate solutions of calcium, zinc and sodium salt precipitate could be formed in the case of A. calcium only B. zinc only C. calcium and znic only D. sodium and zinc only |
C |
| 32. |
The condensation of several amino acid molecules gives A. long chain alkanoic acids B. secondary alkanols C. alkanoates D. proteins |
D |
| 33. |
Which of the following statements is true of an endothermic reaction? I. Heat is absorbed from the surrounding II. The heat content of the products is more than that of the reactants III. The enthalpy change is positive IV. The surrounding is at a lower temperature than the system. A. l only B. l and ll only C. l,ll and lll only D. l, ll, lll and lV |
D |
| 34. |
What is the change in the oxidation number of 1- in the reaction represented by the following equation? 51 -1(aq) + 6H+(aq) + 1O-3(aq) → 312(g) + 3H2O(l) A. -5 to -3 B. -1 to 0 C. + 5 to + 0 D. -1 to + 2 |
B |
| 35. |
The key factor to be considered in siting a chemical industry is A. favourable climatic conditions B. the availability of space to store raw materials C. its nearness to other industrial establishments D. its nearness to the source of raw materials |
D |
| 36. |
Which of the following reactions will be affected by change in pressure at equilibrium? A. X(g) + Y(g) ⇌ W(g) + Z(g) B. X(g) + 2Y(g) ⇌W(g) + Z(g) C. 2X(g) ⇌ W(g) + Z(g) D. 2Y(g) ⇌ W(g) + Z(g) |
B |
| 37. |
WHICH OF THE FOLLOWING PETROLEUM FRACTIONS YIELDS VASELINE AND PARAFFIN WAX ON REDISTILLATION? A. DIESEL OIL B. LUBRICATION OIL C. PETROL D. KEROSENE |
B |
| 38. |
What is the product Cx Hy in the following equation? C10H12 → C8H18 + CxHy A. butene B. octane C. ethene D. decane |
C |
| 39. |
Which of the following is required in an experiment to determine the enthalpy of solution of anhydrous CuSO? l. Mass of the anhydrous CuSO 4 II. Volume of water in which the CuSO4 is dissolved lll. lnitial temperature of water lV. Final temperature of the solution A. l and ll only B. lll and IV only C. ll, lll, and IV only D. l, ll, lll, and IV only |
D |
| 40. |
Which of the following pollutants is biodegradable? A. Domestic sewage B. Metal scraps C. Radioactive waste D. Plastic foil |
A |
| 31. |
When ammonium trioxocarbonate (IV) solution is added to separate solutions of calcium, zinc and sodium salt precipitate could be formed in the case of A. calcium only B. zinc only C. calcium and znic only D. sodium and zinc only |
C |
| 32. |
The condensation of several amino acid molecules gives A. long chain alkanoic acids B. secondary alkanols C. alkanoates D. proteins |
D |
| 33. |
Which of the following statements is true of an endothermic reaction? I. Heat is absorbed from the surrounding II. The heat content of the products is more than that of the reactants III. The enthalpy change is positive IV. The surrounding is at a lower temperature than the system. A. l only B. l and ll only C. l,ll and lll only D. l, ll, lll and lV |
D |
| 34. |
What is the change in the oxidation number of 1- in the reaction represented by the following equation? 51 -1(aq) + 6H+(aq) + 1O-3(aq) → 312(g) + 3H2O(l) A. -5 to -3 B. -1 to 0 C. + 5 to + 0 D. -1 to + 2 |
B |
| 35. |
The key factor to be considered in siting a chemical industry is A. favourable climatic conditions B. the availability of space to store raw materials C. its nearness to other industrial establishments D. its nearness to the source of raw materials |
D |
| 36. |
Which of the following reactions will be affected by change in pressure at equilibrium? A. X(g) + Y(g) ⇌ W(g) + Z(g) B. X(g) + 2Y(g) ⇌W(g) + Z(g) C. 2X(g) ⇌ W(g) + Z(g) D. 2Y(g) ⇌ W(g) + Z(g) |
B |
| 37. |
WHICH OF THE FOLLOWING PETROLEUM FRACTIONS YIELDS VASELINE AND PARAFFIN WAX ON REDISTILLATION? A. DIESEL OIL B. LUBRICATION OIL C. PETROL D. KEROSENE |
B |
| 38. |
What is the product Cx Hy in the following equation? C10H12 → C8H18 + CxHy A. butene B. octane C. ethene D. decane |
C |
| 39. |
Which of the following is required in an experiment to determine the enthalpy of solution of anhydrous CuSO? l. Mass of the anhydrous CuSO 4 II. Volume of water in which the CuSO4 is dissolved lll. lnitial temperature of water lV. Final temperature of the solution A. l and ll only B. lll and IV only C. ll, lll, and IV only D. l, ll, lll, and IV only |
D |
| 40. |
Which of the following pollutants is biodegradable? A. Domestic sewage B. Metal scraps C. Radioactive waste D. Plastic foil |
A |