Year :
2009
Title :
Chemistry
Exam :
WASSCE/WAEC MAY/JUNE
Paper 1 | Objectives
1 - 10 of 53 Questions
| # | Question | Ans |
|---|---|---|
| 1. |
Which of the following scientists discovered the neutron? A. Ernest Rutherford B. J.J Thompson C. James Chadwick D. M illikan |
C |
| 2. |
How many protons does 4020Ca contain? A. 20 B. 30 C. 40 D. 60 |
A |
| 3. |
If 100 atoms of element X contains 70 atoms of 9X and 30 atoms of 11X, calculate the relative atomic mass of X A. 9.6 B. 10.6 C. 11.6 D. 20.0 |
A |
| 4. |
Consider the reaction represented by the equation: 23892U + 10 → 139 56Ba + 94 36Kr + 31 0n. The reaction represents a A. nuclear fission B. nuclear fusion C. radioactive decay D. spontaneous disintegration |
A |
| 5. |
How many orbitals are associated with the p-sub energy level? A. 2 B. 3 C. 5 D. 6 |
B |
| 6. |
Which of the following elements has the electronic configuration:1s22s22p63s23p1? [11Na, 13A1, A. Al B. Na C. N D. S |
A |
| 7. |
The following properties are characteristics of transition elements except A. formation of complex ions B. fixed oxidation states C. formation of coloured compounds D. catalytic abilities |
B |
| 8. |
Which of the following ions is isoelectronic with neon? [3Li, 3F, 10Ne, 17CI,19K] A. CI- B. F- C. K+ D. Li,+ |
B |
| 9. |
Which of the following electronic configurations correctly represents an element in period 3 of the periodic table? A. 1s2 2s2 2p2 B. 1s2 2s2 2p6 C. 1s2 2s2 2p6 3s2 3p4 D. 1s2 2s2 2p6 3s2 3p6 4s1 |
C |
| 10. |
An element Q forms a compound QCI5. In which group of the periodic table is Q? A. l B. lll C. V D. VII |
C |
| 1. |
Which of the following scientists discovered the neutron? A. Ernest Rutherford B. J.J Thompson C. James Chadwick D. M illikan |
C |
| 2. |
How many protons does 4020Ca contain? A. 20 B. 30 C. 40 D. 60 |
A |
| 3. |
If 100 atoms of element X contains 70 atoms of 9X and 30 atoms of 11X, calculate the relative atomic mass of X A. 9.6 B. 10.6 C. 11.6 D. 20.0 |
A |
| 4. |
Consider the reaction represented by the equation: 23892U + 10 → 139 56Ba + 94 36Kr + 31 0n. The reaction represents a A. nuclear fission B. nuclear fusion C. radioactive decay D. spontaneous disintegration |
A |
| 5. |
How many orbitals are associated with the p-sub energy level? A. 2 B. 3 C. 5 D. 6 |
B |
| 6. |
Which of the following elements has the electronic configuration:1s22s22p63s23p1? [11Na, 13A1, A. Al B. Na C. N D. S |
A |
| 7. |
The following properties are characteristics of transition elements except A. formation of complex ions B. fixed oxidation states C. formation of coloured compounds D. catalytic abilities |
B |
| 8. |
Which of the following ions is isoelectronic with neon? [3Li, 3F, 10Ne, 17CI,19K] A. CI- B. F- C. K+ D. Li,+ |
B |
| 9. |
Which of the following electronic configurations correctly represents an element in period 3 of the periodic table? A. 1s2 2s2 2p2 B. 1s2 2s2 2p6 C. 1s2 2s2 2p6 3s2 3p4 D. 1s2 2s2 2p6 3s2 3p6 4s1 |
C |
| 10. |
An element Q forms a compound QCI5. In which group of the periodic table is Q? A. l B. lll C. V D. VII |
C |