Year :
1999
Title :
Chemistry
Exam :
WASSCE/WAEC MAY/JUNE
Paper 1 | Objectives
1 - 10 of 42 Questions
| # | Question | Ans |
|---|---|---|
| 1. |
Which of the following atoms contains the highest number of electrons in the outermost shell? A. 8O B. 10Ne C. 15P D. 19K |
B |
| 2. |
What is the electronic configuration of an element represented as 199X? A. 1s 22s2 2p 5 B. 1s22s23s23p3 C. 1s2 2s2 2p 33s2 D. 1s 22s22p 63s23p64s 1 |
A |
| 3. |
Pauli Exclusion Principle is related to A. quantum numbers of electrons B. reversiblility of equlibrium reactions C. electronegativity values of elements D. collision theory of reaction rates |
A |
| 4. |
Which of the orbitals 4s, 4p, 4d and 4f has the lowest energy? A. 4f B. 4p C. 4d D. 4s |
D |
| 5. |
Two radioactive elements Q and S have half-life periods of 10 hours and 20 hours respectively. Therefore A. S decays faster than Q B. Q is twice as stable as S C. Q emits fewer particles than S D. S is more stable than Q |
D |
| 6. |
Calcium atom ionizes by A. gaining two electrons B. losing two electrons C. sharing two electrons D. gaining two protons |
B |
| 7. |
Which of the following properties increases down a group in the Periodic Table? A. Atomic radius B. Electronegativity C. Electon affinity D. Ionization energy |
A |
| 8. |
In the Periodic Table, the elements that loss electrons most readily belong to A. Group 1 A B. Group 11 A C. Group 111 A D. Group V11 A |
A |
| 9. |
Which of the following reactions is not feasible? A. Cl2 + 2Kl → 2KCI + I2 B. Cl2 + 2NaF → 2NaCI + F2 C. Zn + CuCI2 ZnCl2 + Cu D. Zn + 2AgNO3 → Zn(NO3)2 + 2Ag |
B |
| 10. |
Which of the following halogens is the most reactive? A. F2 B. Br2 C. l2 D. Cl |
A |
| 1. |
Which of the following atoms contains the highest number of electrons in the outermost shell? A. 8O B. 10Ne C. 15P D. 19K |
B |
| 2. |
What is the electronic configuration of an element represented as 199X? A. 1s 22s2 2p 5 B. 1s22s23s23p3 C. 1s2 2s2 2p 33s2 D. 1s 22s22p 63s23p64s 1 |
A |
| 3. |
Pauli Exclusion Principle is related to A. quantum numbers of electrons B. reversiblility of equlibrium reactions C. electronegativity values of elements D. collision theory of reaction rates |
A |
| 4. |
Which of the orbitals 4s, 4p, 4d and 4f has the lowest energy? A. 4f B. 4p C. 4d D. 4s |
D |
| 5. |
Two radioactive elements Q and S have half-life periods of 10 hours and 20 hours respectively. Therefore A. S decays faster than Q B. Q is twice as stable as S C. Q emits fewer particles than S D. S is more stable than Q |
D |
| 6. |
Calcium atom ionizes by A. gaining two electrons B. losing two electrons C. sharing two electrons D. gaining two protons |
B |
| 7. |
Which of the following properties increases down a group in the Periodic Table? A. Atomic radius B. Electronegativity C. Electon affinity D. Ionization energy |
A |
| 8. |
In the Periodic Table, the elements that loss electrons most readily belong to A. Group 1 A B. Group 11 A C. Group 111 A D. Group V11 A |
A |
| 9. |
Which of the following reactions is not feasible? A. Cl2 + 2Kl → 2KCI + I2 B. Cl2 + 2NaF → 2NaCI + F2 C. Zn + CuCI2 ZnCl2 + Cu D. Zn + 2AgNO3 → Zn(NO3)2 + 2Ag |
B |
| 10. |
Which of the following halogens is the most reactive? A. F2 B. Br2 C. l2 D. Cl |
A |