Chemistry
Paper 1 | Objectives | 47 Questions
WASSCE/WAEC MAY/JUNE
Year: 2013
Level: SHS
Time:
Type: Question Paper
Answers provided
FREE
No description provided
Feedbacks
This paper is yet to be rated
Paper 1 | Objectives | 47 Questions
WASSCE/WAEC MAY/JUNE
Year: 2013
Level: SHS
Time:
Type: Question Paper
Answers provided
No description provided
This paper is yet to be rated
Get free IT courses with certificates online for your skills upgrade in this era of Covid-19.
Eat well during in test days for good grades. How can you plan your exam diet with good grades in mind?
How can past papers boost your revision? See how practicing past test is a good way to get higher grades.
| # | Question | Ans |
|---|---|---|
| 1. |
Which of the following instruments is used in detecting the presence of radiation? A. Cathode ray tube B. Geiger-Muller counter C. Mass spectrometer D. X-ray tube
Show Content
Detailed SolutionThe Geiger- Muller counter is a device for measuring radioactivity by detecting and counting ionizing particles. |
|
| 2. |
The molecule which has a linear shape is A. CH4 B. NH3 C. H2S D. CO2
Show Content
Detailed SolutionThe shapes of the molecules are:CH\(_4\) - Tetrahedral; NH\(_3\) - Trigonal pyramidal; H\(_2\)S - Bent; C)\(_2\) - Linear. |
|
| 3. |
The formula of the compound formed between a trivalent metal, M and a divalent non-metal, Y is A. M2Y3 B. M3Y2 C. MY D. M3Y
Show Content
Detailed SolutionM is a trivalent metal i.e M = 3+ ; Y is a divalent non-metal i.e Y = 2-A reaction between M and Y will yield M\(_2\)Y\(_3\). |
|
| 4. |
An atom of an element X gains two electrons. The symbol of the ion formed is A. X + B. X 2+ C. X 2- D. X -
Show Content
Detailed SolutionX gained two electrons. X = 2-.The ion formed is X\(^{2-}\). |
|
| 5. |
Which of the following statements is correct? A. Atomic size decreases down the group B. Atomic size increases across the period C. Anions are smaller than the parent atom D. Cations are smaller than the parent atom
Show Content
Detailed SolutionA cation is a positively charged ion. This means electron is given out by a cation, hence the cation is smaller than the parent atom. |
|
| 6. |
Which of the following arrangements represents the correct order of electronic energy level? A. 1s 2p 2s 3p 3s 3d 4s B. 1s 2s 2p 3s 3p 3d 4s C. 1s 2s 2p 3s 3p 4s 3d D. 1s 2s 3s 2p 3p 4s 3d |
C |
| 7. |
The element with electron configuration 1s\(^2\) 2s\(^2\) 2p\(^6\) 3s\(^2\) 3p\(^1\) belongs to A. s-block period 3, group 1 B. p-block, period 3, group 2 C. s-block, period 3, group 3 D. p-block, period 3, group 3
Show Content
Detailed Solution1s\(^2\) 2s\(^2\) 2p\(^6\) 3s\(^2\) 3p\(^1\) = 2, 8, 3.The element is in period 3 and group 3. |
|
| 8. |
In the periodic table all elements within the same group have the same A. number of neutrons B. number of valence electrons C. number of isotopes D. atomic number
Show Content
Detailed SolutionThe elements in the same group in the periodic table has the same number of electrons in the outer shell. That means, they have the same number of valence electrons. |
|
| 9. |
Which of the following halogens is liquid at room temperature? A. lodine B. Chlorine C. Bromine D. Fluorine
Show Content
Detailed SolutionBromine is a reddish-brown liquid at room temperature. |
|
| 10. |
Rare gases are stable because they A. are chemically active B. contain equal number of protons and neutrons C. contain more electrons than protons D. have octet structures
Show Content
Detailed SolutionThey are the most stable due to having the maximum number of valence electrons their outer shell can hold. That means rare gases have the octet configuration. |
Preview displays only 10 out of the 47 Questions