Year :
1994
Title :
Chemistry
Exam :
WASSCE/WAEC MAY/JUNE
Paper 1 | Objectives
21 - 30 of 36 Questions
| # | Question | Ans |
|---|---|---|
| 21. |
The positive of an element in the Periodic Table is determined by A. its density B. its atomic radius C. its relative atomic mass D. the number of protons in its atom E. the number of neutrons in its atom |
D |
| 22. |
Which of the following electronic structures belongs to a noble gas? A. 1s22s2 B. 1s 22s22p4 C. 1s22s22p63s23p6 D. 1s22s22p2 E. 1s22s22p 63s23p3 |
C |
| 23. |
In a chemical reaction, the reacting species possess energy of motion known as A. potential energy B. free energy C. bond energy D. kinetic energy E. hydration energy |
D |
| 24. |
The following compounds will decompose on heating except A. NaHCO3 B. K2CO3 C. MgCO3 D. Ca(HCO3)2 E. ZnCO3 |
B |
| 25. |
Which of the following reactions is accompanied by the first ionization energy of an element X? A. X +(aq) → X 2+ (aq) + e- B. X - (g) → X(g) + e- C. X+ (g) → X2+ +e- D. X (g) → X+ (g) +e- E. X(s) → X + (g) + e- |
D |
| 26. |
What is the molar of hydrogen sulphide gas in the reaction H2SO4(aq) + 3H2S(g) → 4S(s) + 4H2O (l)n represented by the following equation? A. Reducing agent B. A bleaching agent C. A dehydrating agent D. A sulphonating agent E. An oxidizing agent |
A |
| 27. |
Alkanols have unexpectedly high boiling points relative to their molar masses because of intermolecular A. hydrogen bonding B. metallic bonding C. covalent bonding D. ionic bonding E. van der Waals' forces |
A |
| 28. |
Sodium chloride is used in the following processes except in the A. treatment of polluted water B. preservation of food C. separation of soap from glycerol D. manufacture of chlorine E. manufacture of caustic soda |
A |
| 29. |
The gaseous product formed when ammonia is passed over heated copper (ll) oxide is A. oxygen B. nitrogen C. hydrogen D. nitrogen (l) oxide E. nitrogen (ll) oxide |
B |
| 30. |
Which of the following is not a halogen? A. Silicon B. Fluorine C. Astatine D. Bromine E. lodine |
A |
| 21. |
The positive of an element in the Periodic Table is determined by A. its density B. its atomic radius C. its relative atomic mass D. the number of protons in its atom E. the number of neutrons in its atom |
D |
| 22. |
Which of the following electronic structures belongs to a noble gas? A. 1s22s2 B. 1s 22s22p4 C. 1s22s22p63s23p6 D. 1s22s22p2 E. 1s22s22p 63s23p3 |
C |
| 23. |
In a chemical reaction, the reacting species possess energy of motion known as A. potential energy B. free energy C. bond energy D. kinetic energy E. hydration energy |
D |
| 24. |
The following compounds will decompose on heating except A. NaHCO3 B. K2CO3 C. MgCO3 D. Ca(HCO3)2 E. ZnCO3 |
B |
| 25. |
Which of the following reactions is accompanied by the first ionization energy of an element X? A. X +(aq) → X 2+ (aq) + e- B. X - (g) → X(g) + e- C. X+ (g) → X2+ +e- D. X (g) → X+ (g) +e- E. X(s) → X + (g) + e- |
D |
| 26. |
What is the molar of hydrogen sulphide gas in the reaction H2SO4(aq) + 3H2S(g) → 4S(s) + 4H2O (l)n represented by the following equation? A. Reducing agent B. A bleaching agent C. A dehydrating agent D. A sulphonating agent E. An oxidizing agent |
A |
| 27. |
Alkanols have unexpectedly high boiling points relative to their molar masses because of intermolecular A. hydrogen bonding B. metallic bonding C. covalent bonding D. ionic bonding E. van der Waals' forces |
A |
| 28. |
Sodium chloride is used in the following processes except in the A. treatment of polluted water B. preservation of food C. separation of soap from glycerol D. manufacture of chlorine E. manufacture of caustic soda |
A |
| 29. |
The gaseous product formed when ammonia is passed over heated copper (ll) oxide is A. oxygen B. nitrogen C. hydrogen D. nitrogen (l) oxide E. nitrogen (ll) oxide |
B |
| 30. |
Which of the following is not a halogen? A. Silicon B. Fluorine C. Astatine D. Bromine E. lodine |
A |