Year :
2003
Title :
Chemistry
Exam :
WASSCE/WAEC MAY/JUNE
Paper 1 | Objectives
31 - 37 of 37 Questions
| # | Question | Ans |
|---|---|---|
| 31. |
When excess ethene is shaken with acidified KMnO4 solution, the product obtained is A. ethane B. ethanal C. ethane - 1, 2 - diol D. ethanoic acid |
C |
| 32. |
What volume of 0.20 mol dm -3 NaOH solution would yield 5.0 g of NaOH on evaporation to dryness? [NaOH = 40g mol-1] A. 400 cm3 B. 625 cm3 C. 1000 cm3 D. 1600 cm 3 Detailed SolutionConc. g/dm3 = 0.20 x 40 gmol -1 = 8 g/dm31000 cm3 of 0.20m NaOH contains 8g of NaOH :. 5g of NaOH will be contained in 5/8 x 1000 x 625cm3 |
|
| 33. |
Which of the following compound is used for removing impurities from bauxite? A. NaOH B. CaCO3 C. Na3AIF6 D. H2SO4 |
A |
| 34. |
What is the main impurity in haematite? A. CaSiO3 B. CaCO3 C. SiO3 D. Fe2O3 |
C |
| 35. |
When a sample of water was boiled, it lathered more readily with soap. it can be concluded that the sample most likely contained A. magnesium tetraoxosulphate (VI) B. suspended solids C. Organic impurities D. calcium hydrogentrioxocarbonate (IV) |
D |
| 36. |
What are the two gases associated with the formation of acid rain? A. CO2 and HCI B. CO2 and N2 C. CO2 and NO2 D. HCI ans SO2 |
C |
| 37. |
Which of the following processes will pollute water? A. Exposure of a body of water ultraviolet rays B. Discharge of industrial effluents effluents into water ways C. Passage of river water through a send bed D. Addition of a measured quantity of chlorine to water |
B |
| 31. |
When excess ethene is shaken with acidified KMnO4 solution, the product obtained is A. ethane B. ethanal C. ethane - 1, 2 - diol D. ethanoic acid |
C |
| 32. |
What volume of 0.20 mol dm -3 NaOH solution would yield 5.0 g of NaOH on evaporation to dryness? [NaOH = 40g mol-1] A. 400 cm3 B. 625 cm3 C. 1000 cm3 D. 1600 cm 3 Detailed SolutionConc. g/dm3 = 0.20 x 40 gmol -1 = 8 g/dm31000 cm3 of 0.20m NaOH contains 8g of NaOH :. 5g of NaOH will be contained in 5/8 x 1000 x 625cm3 |
|
| 33. |
Which of the following compound is used for removing impurities from bauxite? A. NaOH B. CaCO3 C. Na3AIF6 D. H2SO4 |
A |
| 34. |
What is the main impurity in haematite? A. CaSiO3 B. CaCO3 C. SiO3 D. Fe2O3 |
C |
| 35. |
When a sample of water was boiled, it lathered more readily with soap. it can be concluded that the sample most likely contained A. magnesium tetraoxosulphate (VI) B. suspended solids C. Organic impurities D. calcium hydrogentrioxocarbonate (IV) |
D |
| 36. |
What are the two gases associated with the formation of acid rain? A. CO2 and HCI B. CO2 and N2 C. CO2 and NO2 D. HCI ans SO2 |
C |
| 37. |
Which of the following processes will pollute water? A. Exposure of a body of water ultraviolet rays B. Discharge of industrial effluents effluents into water ways C. Passage of river water through a send bed D. Addition of a measured quantity of chlorine to water |
B |