Year :
2007
Title :
Chemistry
Exam :
WASSCE/WAEC MAY/JUNE
Paper 1 | Objectives
31 - 39 of 39 Questions
| # | Question | Ans |
|---|---|---|
| 31. |
Consider the reaction below: Vegetable oil \(\frac{H2;NI catalyst}{High temperature}\) product. The reaction is applied in the manufacture of? A. drugs B. margarine C. paraffin wax D. soapy detergents Detailed SolutionThis is called hydrogenation. It includes the manufacture of margarine from animal or vegetable fats and oils.Ethene reacts with hydrogen in the presence of a finely divided nickel catalyst at a temperature of about 150°C. Ethane is produced. |
|
| 32. |
Which of the following compounds reacts readily with sodium to liberate hydrogen? A. CH3CH2CH3 B. CH3COOH C. CH3 CH2CHO D. CH3 CH(OH)CH3 |
B |
| 33. |
Glucose reduces Fehling's solution on warming to A. copper (l) oxide B. copper (ll) oxide C. copper (l) chloride D. copper (ll) hydroxide |
A |
| 34. |
From the following ores is iron extracted? I. Haematite ll. Bauxite III. Magnetite IV. Cassiterite A. l and ll only B. l and lll only C. l, ll and lll only D. l, ll, lll and lV |
B |
| 35. |
Which of the following methods can be used to separate a mixture of two miscible liquids with different boiling points? A. Decantation B. Distillation C. Evaporation D. Filtration |
B |
| 36. |
The following substances are heavy chemicals except A. sodium trioxocarbonate (IV) B. tetraoxosulphate (VI) acid C. lead (lV) tetraethyl D. sodium hydroxide |
C |
| 37. |
Pig-iron is brittle because it contains A. a high percentage of carbon as impurity B. calcium trioxosilicate (IV) C. unreacted haematite D. undecomposed limestone |
A |
| 38. |
What volume will 0.5 g of H2 occupy at s.t.p? [H = 1; 1 mole of a gas occupy 22.4 dm3 at s.t.p.] A. 2.24 dm3 B. 5.60dm3 C. 11.20dm3 D. 44.80dm3 |
B |
| 39. |
Which of the these metals will not liberate hydrogen from dilute HCI? A. Copper B. Iron C. Magnesium D. Zinc |
A |
| 31. |
Consider the reaction below: Vegetable oil \(\frac{H2;NI catalyst}{High temperature}\) product. The reaction is applied in the manufacture of? A. drugs B. margarine C. paraffin wax D. soapy detergents Detailed SolutionThis is called hydrogenation. It includes the manufacture of margarine from animal or vegetable fats and oils.Ethene reacts with hydrogen in the presence of a finely divided nickel catalyst at a temperature of about 150°C. Ethane is produced. |
|
| 32. |
Which of the following compounds reacts readily with sodium to liberate hydrogen? A. CH3CH2CH3 B. CH3COOH C. CH3 CH2CHO D. CH3 CH(OH)CH3 |
B |
| 33. |
Glucose reduces Fehling's solution on warming to A. copper (l) oxide B. copper (ll) oxide C. copper (l) chloride D. copper (ll) hydroxide |
A |
| 34. |
From the following ores is iron extracted? I. Haematite ll. Bauxite III. Magnetite IV. Cassiterite A. l and ll only B. l and lll only C. l, ll and lll only D. l, ll, lll and lV |
B |
| 35. |
Which of the following methods can be used to separate a mixture of two miscible liquids with different boiling points? A. Decantation B. Distillation C. Evaporation D. Filtration |
B |
| 36. |
The following substances are heavy chemicals except A. sodium trioxocarbonate (IV) B. tetraoxosulphate (VI) acid C. lead (lV) tetraethyl D. sodium hydroxide |
C |
| 37. |
Pig-iron is brittle because it contains A. a high percentage of carbon as impurity B. calcium trioxosilicate (IV) C. unreacted haematite D. undecomposed limestone |
A |
| 38. |
What volume will 0.5 g of H2 occupy at s.t.p? [H = 1; 1 mole of a gas occupy 22.4 dm3 at s.t.p.] A. 2.24 dm3 B. 5.60dm3 C. 11.20dm3 D. 44.80dm3 |
B |
| 39. |
Which of the these metals will not liberate hydrogen from dilute HCI? A. Copper B. Iron C. Magnesium D. Zinc |
A |