Year :
1995
Title :
Chemistry
Exam :
WASSCE/WAEC MAY/JUNE
Paper 1 | Objectives
21 - 29 of 29 Questions
| # | Question | Ans |
|---|---|---|
| 21. |
In which of the following processes are larger molecules broken down into smaller molecules? A. Vulcanization of rubber B. Hydrogenation of palm oil C. Hydrolysis of starch D. Polymerization E. Esterification |
C |
| 22. |
The following alkanols will yield alkanoic acids on reacting with excess acidified K2Cr2O7 except A. CH3CH2OH B. (CH3)2CHCH2OH C. (CH3)3CCH2OH D. (CH3)3COH E. CH3CH2CH2CH2OH |
D |
| 23. |
Which of the following is an alloy of mercury? A. Stainless steel B. Soft solder C. Coinage bronze D. Amalgam E. Duralumin |
D |
| 24. |
The function of limestone in the extraction of iron in the blast furnace is A. removal of the earthly impurities B. decomposition of the iron ore C. conversion of iron (lll) to iron (ll) compounds D. generation of heat for the process E. conversion of coke to carbon(ll)oxide |
A |
| 25. |
Metals which react with steam only when they are red-hot include A. copper B. sodium C. calcium D. gold E. iron |
E |
| 26. |
Copper (ll) tetraoxosulphate (VI) is often added to swimming pools because it A. prevents the growth of algae B. coagulates suspended particles C. neutralizes dissolved gases in water D. reacts with any excess chlorine present E. increases the amount of dissolved oxygen |
A |
| 27. |
The following salts dissolve readily in cold water except A. CaCI2 B. PbSO4 C. (NH4)2SO4 D. Na2CO3 E. Na2SO3 |
B |
| 28. |
What is the amount (in mole) of hydrogen gas that would be produced if 0.6 mole of hydrochloric acid reacted with excess zinc according to the following equation? Zn(s) + 2HCI(aq) → ZnCI2(aq) + H2(g) A. 0.1 mole B. 0.2mole C. 0.3 mole D. 1.0 mole E. 2.9 moles |
C |
| 29. |
What is the amount (in mole) of hydrogen gas that would be produced if 0.6 mole of hydrochloric acid reacted with excess zinc according to the following equation? Zn(s) + 2HCI(aq) → ZnCI2(aq) + H2(g) A. 0.1 mole B. 0.2mole C. 0.3 mole D. 1.0 mole E. 2.9 moles |
C |
| 21. |
In which of the following processes are larger molecules broken down into smaller molecules? A. Vulcanization of rubber B. Hydrogenation of palm oil C. Hydrolysis of starch D. Polymerization E. Esterification |
C |
| 22. |
The following alkanols will yield alkanoic acids on reacting with excess acidified K2Cr2O7 except A. CH3CH2OH B. (CH3)2CHCH2OH C. (CH3)3CCH2OH D. (CH3)3COH E. CH3CH2CH2CH2OH |
D |
| 23. |
Which of the following is an alloy of mercury? A. Stainless steel B. Soft solder C. Coinage bronze D. Amalgam E. Duralumin |
D |
| 24. |
The function of limestone in the extraction of iron in the blast furnace is A. removal of the earthly impurities B. decomposition of the iron ore C. conversion of iron (lll) to iron (ll) compounds D. generation of heat for the process E. conversion of coke to carbon(ll)oxide |
A |
| 25. |
Metals which react with steam only when they are red-hot include A. copper B. sodium C. calcium D. gold E. iron |
E |
| 26. |
Copper (ll) tetraoxosulphate (VI) is often added to swimming pools because it A. prevents the growth of algae B. coagulates suspended particles C. neutralizes dissolved gases in water D. reacts with any excess chlorine present E. increases the amount of dissolved oxygen |
A |
| 27. |
The following salts dissolve readily in cold water except A. CaCI2 B. PbSO4 C. (NH4)2SO4 D. Na2CO3 E. Na2SO3 |
B |
| 28. |
What is the amount (in mole) of hydrogen gas that would be produced if 0.6 mole of hydrochloric acid reacted with excess zinc according to the following equation? Zn(s) + 2HCI(aq) → ZnCI2(aq) + H2(g) A. 0.1 mole B. 0.2mole C. 0.3 mole D. 1.0 mole E. 2.9 moles |
C |
| 29. |
What is the amount (in mole) of hydrogen gas that would be produced if 0.6 mole of hydrochloric acid reacted with excess zinc according to the following equation? Zn(s) + 2HCI(aq) → ZnCI2(aq) + H2(g) A. 0.1 mole B. 0.2mole C. 0.3 mole D. 1.0 mole E. 2.9 moles |
C |