Year :
2014
Title :
Chemistry
Exam :
WASSCE/WAEC MAY/JUNE
Paper 1 | Objectives
1 - 10 of 45 Questions
| # | Question | Ans |
|---|---|---|
| 1. |
The shape of CH4 is A. linear B. planar C. pyramidal D. tetrahedral |
D |
| 2. |
The crystal layers in graphite are held together by A. covalent bond B. electrostatic forces C. ionic bond D. van der Waal's forces Detailed SolutionThe atoms in a given layer are held together by strong covalent linkages, but the forces between the layers are the weak van der waals forces |
|
| 3. |
Hydrogen bonds are formed between molecules containing a hydrogen atom bonded to a A. strongly electronegative atom B. non-polar species C. diatomic element D. complex ion |
A |
| 4. |
The two elements 11X and 19Y are in the same group because they have the same A. valence electrons B. ionization energy C. number of shell D. atomic size |
A |
| 5. |
Which of the following arrangements is in decreasing order of atomic radius? A. Li>Be>C> B. Li>B>Be>C C. Li>Be>B>C D. C>B>Be>Li |
C |
| 6. |
Which of the following processes is used in food preservation in an industry? A. Carbon dating B. Ieeadiation of gamma rays C. Nuclear fission D. Nuclear fusion |
B |
| 7. |
The electron configuration of 26Fe3+ is? A. [Ar]4s23d6 B. [AR]4s23d3 C. [AR]4s13d4 D. [AR]4s03d5 |
D |
| 8. |
Which of the following transition metals is not attracted to external magnetic field? A. Cu B. Fe C. Ti D. Zn |
A |
| 9. |
An atom W has 17 electrons and 18 neutrons. Which of the following representations of the atom is correct? A. 1718W B. 1817W C. 3517W D. 3518W Detailed SolutionThe superscript is the atomic mass = 35(The mass number also called atomic mass number or nucleon number, is the total number of protons and neutrons) The subscript is the atomic or proton number = 17 The number of electrons in a neutral atom is equal to the number of protons. |
|
| 10. |
The relative atomic mass of chlorine is not a whole number because A. it is the weighted average mass of all its various isotopes B. it is the average mass of all the isotopes of the element C. the element has strong oxidizing ability D. the atom contains a higher number of neutrons than protons |
B |
| 1. |
The shape of CH4 is A. linear B. planar C. pyramidal D. tetrahedral |
D |
| 2. |
The crystal layers in graphite are held together by A. covalent bond B. electrostatic forces C. ionic bond D. van der Waal's forces Detailed SolutionThe atoms in a given layer are held together by strong covalent linkages, but the forces between the layers are the weak van der waals forces |
|
| 3. |
Hydrogen bonds are formed between molecules containing a hydrogen atom bonded to a A. strongly electronegative atom B. non-polar species C. diatomic element D. complex ion |
A |
| 4. |
The two elements 11X and 19Y are in the same group because they have the same A. valence electrons B. ionization energy C. number of shell D. atomic size |
A |
| 5. |
Which of the following arrangements is in decreasing order of atomic radius? A. Li>Be>C> B. Li>B>Be>C C. Li>Be>B>C D. C>B>Be>Li |
C |
| 6. |
Which of the following processes is used in food preservation in an industry? A. Carbon dating B. Ieeadiation of gamma rays C. Nuclear fission D. Nuclear fusion |
B |
| 7. |
The electron configuration of 26Fe3+ is? A. [Ar]4s23d6 B. [AR]4s23d3 C. [AR]4s13d4 D. [AR]4s03d5 |
D |
| 8. |
Which of the following transition metals is not attracted to external magnetic field? A. Cu B. Fe C. Ti D. Zn |
A |
| 9. |
An atom W has 17 electrons and 18 neutrons. Which of the following representations of the atom is correct? A. 1718W B. 1817W C. 3517W D. 3518W Detailed SolutionThe superscript is the atomic mass = 35(The mass number also called atomic mass number or nucleon number, is the total number of protons and neutrons) The subscript is the atomic or proton number = 17 The number of electrons in a neutral atom is equal to the number of protons. |
|
| 10. |
The relative atomic mass of chlorine is not a whole number because A. it is the weighted average mass of all its various isotopes B. it is the average mass of all the isotopes of the element C. the element has strong oxidizing ability D. the atom contains a higher number of neutrons than protons |
B |