Year :
2004
Title :
Chemistry
Exam :
WASSCE/WAEC MAY/JUNE
Paper 1 | Objectives
11 - 20 of 42 Questions
| # | Question | Ans |
|---|---|---|
| 11. |
Which of the following pairs of salts undergo hydrolysis? A. AlCI3 and NH4CI B. AICI3 and NaCI C. FeCI3 and KCI D. Na2SO4 and K2 SO4 |
A |
| 12. |
The alloy used extensively in the building industry is A. steel B. bronze C. duralumin D. type metal |
A |
| 13. |
Which of the following salts is not prepared by precipitation? A. Lead (ll) trioxocarbonate (lV) B. Barium trioxocarbonate (IV) C. Sodium trioxocarbnate (IV) D. Calcium trioxocarbonate (IV) |
C |
| 14. |
What volume of hydrogen would be left over when 300cm3 of oxygen and 1000cm of hydrogen are exploded in a sealed tube? [2H2(g) + O2(g) → 2H2 Og] A. 200 cm3 B. 400 cm3 C. 600cm3 D. 700cm3 Detailed Solution2H2(g) + O 2(g) → 2H2Og2V IV 2V 600cm3 300cm3 600cm3 The volume of hydrogen left over = 1000 - 600 = 400cm3? |
|
| 15. |
What are the values of x, y and z respectively in the following in the following equation? MnO 2(s) + xHCI(aq) → MnCI2(g) + yHO(l) + zCI2(g) A. 4,1,2 B. 1,2,1 C. 2,1,2 D. 4,2,1 |
D |
| 16. |
Which of the following subtances will not produce effervescence with dilute hydeochloric acid? A. Copper (ll) trioxocarbonate (IV) B. Potassium hydrogentrioxocarbonate (lV) C. Zinc granules D. Sodium chloride |
D |
| 17. |
What quantity of electrons in moles is needed to discharge two moles of aluminum from aluminum oxide (AI 2O3) A. 1 B. 2 C. 4 D. 6 Detailed SolutionOne mole of aluminium from aluminium oxide gives three elecrrons. Two moles of aluminium from aluminium oxide give six electrons |
|
| 18. |
Two solutions containing Pb2+ and AI3+ respectively can be distingusihed using A. NaOH(aq) B. NH3(aq) C. HCI3 D. HCI |
D |
| 19. |
A solution of zinc chloride should not be stored in a container made of A. tin B. copper C. aluminium D. lead |
C |
| 20. |
Glucose gives a brick-red precipitate with Fehling's solution because it is A. carbohydrate B. an alkanoate C. a reducing sugar D. a non-electrolyte |
C |
| 11. |
Which of the following pairs of salts undergo hydrolysis? A. AlCI3 and NH4CI B. AICI3 and NaCI C. FeCI3 and KCI D. Na2SO4 and K2 SO4 |
A |
| 12. |
The alloy used extensively in the building industry is A. steel B. bronze C. duralumin D. type metal |
A |
| 13. |
Which of the following salts is not prepared by precipitation? A. Lead (ll) trioxocarbonate (lV) B. Barium trioxocarbonate (IV) C. Sodium trioxocarbnate (IV) D. Calcium trioxocarbonate (IV) |
C |
| 14. |
What volume of hydrogen would be left over when 300cm3 of oxygen and 1000cm of hydrogen are exploded in a sealed tube? [2H2(g) + O2(g) → 2H2 Og] A. 200 cm3 B. 400 cm3 C. 600cm3 D. 700cm3 Detailed Solution2H2(g) + O 2(g) → 2H2Og2V IV 2V 600cm3 300cm3 600cm3 The volume of hydrogen left over = 1000 - 600 = 400cm3? |
|
| 15. |
What are the values of x, y and z respectively in the following in the following equation? MnO 2(s) + xHCI(aq) → MnCI2(g) + yHO(l) + zCI2(g) A. 4,1,2 B. 1,2,1 C. 2,1,2 D. 4,2,1 |
D |
| 16. |
Which of the following subtances will not produce effervescence with dilute hydeochloric acid? A. Copper (ll) trioxocarbonate (IV) B. Potassium hydrogentrioxocarbonate (lV) C. Zinc granules D. Sodium chloride |
D |
| 17. |
What quantity of electrons in moles is needed to discharge two moles of aluminum from aluminum oxide (AI 2O3) A. 1 B. 2 C. 4 D. 6 Detailed SolutionOne mole of aluminium from aluminium oxide gives three elecrrons. Two moles of aluminium from aluminium oxide give six electrons |
|
| 18. |
Two solutions containing Pb2+ and AI3+ respectively can be distingusihed using A. NaOH(aq) B. NH3(aq) C. HCI3 D. HCI |
D |
| 19. |
A solution of zinc chloride should not be stored in a container made of A. tin B. copper C. aluminium D. lead |
C |
| 20. |
Glucose gives a brick-red precipitate with Fehling's solution because it is A. carbohydrate B. an alkanoate C. a reducing sugar D. a non-electrolyte |
C |