Year :
1996
Title :
Chemistry
Exam :
WASSCE/WAEC MAY/JUNE
Paper 1 | Objectives
21 - 30 of 36 Questions
| # | Question | Ans |
|---|---|---|
| 21. |
What amount of hydrogen will be required for complete hydrogenation of one mole of pent-3-yne? A. 1 mole B. 2 moles C. 3 moles D. 5 moles E. 6 moles |
B |
| 22. |
When excess carbon (lV) oxide is passed into lime water, the turbidity produced initially disappears due to the formation of A. calcium oxide B. calcium carbide C. calcium hydrogentrioxocarbonate (IV) D. trioxocarbonate (IV) acid E. calcium trioxocarbonate (IV) |
C |
| 23. |
Which of the following is a disaccharide? A. fructose B. starch C. cellulose D. sucrose E. glycogen |
D |
| 24. |
Use this following information to answer this question. Compound X was boiled with concentrated hydrochloric acid for a long time. One of the products was found to be a sugar. Compound X was probably A. rubber B. polyethene C. nylon D. cellulose E. ethanol |
D |
| 25. |
Use this following information to answer this question. Compound X was boiled with concentrated hydrochloric acid for a long time. One of the products was found to be a sugar. What type of reaction was involved between compound X and concentrated hydrochloric acid? A. Polymerization B. Fermentation C. Hydrolysis D. Neutralization E. Esterification |
C |
| 26. |
The component of air that can be removed by alkaline pyrogallol solution is A. oxygen B. nitrogen C. water vapour D. carbon (IV) oxide E. noble gases |
A |
| 27. |
During water treatment for town supply, water is passed through layers of send beds in order to A. soften the water B. filter the water C. decolorize the water D. destroy the germs in the water E. coagulate colloidal particles in the water |
B |
| 28. |
The cleansing action of soap in hard water is not satisfactory because soap A. forms insoluble calcium and magnesium salts B. is made from fats and oils C. has an organic component D. alters the surface tension of water E. is a sodium salt of higher carboxylic acids |
A |
| 29. |
What is the role of MnO2 in the reaction represented by the following equation?MnO2 + 4HCI2 + CI2 + 2H2O A. Bleaching agent B. Oxidizing agent C. Amphoteric oxide D. Basic oxide E. Catalyst |
B |
| 30. |
Nitrogen is prepared on a large scale by the A. fractional distillation of liquefied air B. decomposition of ammonium dioxonitrate (lll) C. electrolysis of brine D. Haber process E. Contact process |
A |
| 21. |
What amount of hydrogen will be required for complete hydrogenation of one mole of pent-3-yne? A. 1 mole B. 2 moles C. 3 moles D. 5 moles E. 6 moles |
B |
| 22. |
When excess carbon (lV) oxide is passed into lime water, the turbidity produced initially disappears due to the formation of A. calcium oxide B. calcium carbide C. calcium hydrogentrioxocarbonate (IV) D. trioxocarbonate (IV) acid E. calcium trioxocarbonate (IV) |
C |
| 23. |
Which of the following is a disaccharide? A. fructose B. starch C. cellulose D. sucrose E. glycogen |
D |
| 24. |
Use this following information to answer this question. Compound X was boiled with concentrated hydrochloric acid for a long time. One of the products was found to be a sugar. Compound X was probably A. rubber B. polyethene C. nylon D. cellulose E. ethanol |
D |
| 25. |
Use this following information to answer this question. Compound X was boiled with concentrated hydrochloric acid for a long time. One of the products was found to be a sugar. What type of reaction was involved between compound X and concentrated hydrochloric acid? A. Polymerization B. Fermentation C. Hydrolysis D. Neutralization E. Esterification |
C |
| 26. |
The component of air that can be removed by alkaline pyrogallol solution is A. oxygen B. nitrogen C. water vapour D. carbon (IV) oxide E. noble gases |
A |
| 27. |
During water treatment for town supply, water is passed through layers of send beds in order to A. soften the water B. filter the water C. decolorize the water D. destroy the germs in the water E. coagulate colloidal particles in the water |
B |
| 28. |
The cleansing action of soap in hard water is not satisfactory because soap A. forms insoluble calcium and magnesium salts B. is made from fats and oils C. has an organic component D. alters the surface tension of water E. is a sodium salt of higher carboxylic acids |
A |
| 29. |
What is the role of MnO2 in the reaction represented by the following equation?MnO2 + 4HCI2 + CI2 + 2H2O A. Bleaching agent B. Oxidizing agent C. Amphoteric oxide D. Basic oxide E. Catalyst |
B |
| 30. |
Nitrogen is prepared on a large scale by the A. fractional distillation of liquefied air B. decomposition of ammonium dioxonitrate (lll) C. electrolysis of brine D. Haber process E. Contact process |
A |