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- 1. Multiple Choice
Which of the following statements involve chemistry field?
Study of the animal cell structure
Optimising the insulation for heat
Investigate the resistance in electricity
Research in increasing the melting point of a substance
- 2. Multiple Choice
The following statement is found in a report written by a student.
"The increase in temperature of water, will increase the solubility of salt in water"
What type of statement is this?
Aim
Observation
Hypothesis
Problem statement
- 3. Multiple Choice
Which of the following steps are carried out after the data collection?
I and III
I and IV
II and III
II and IV
- 4. Multiple Choice
Which of the following is the importance of personal protective equipment?
Removing chemical substance and dirt from hand
Cleaning the body from chemical spillage
Protecting respiratory organ from chemical fumes
Extinguishing fire from clothing
- 5. Multiple Choice
The diagram shows a safety equipment in the lab. Which of the following chemicals need to be handled inside the safety equipment shown in the diagram?
oxygen gas
chlorine gas
nitric acid
potassium manganate (VII)
- 6. Multiple Choice
The diagram shows substance X stored in paraffin oil. What is substance X?
silver
gold
aluminium
sodium
- 7. Multiple Choice
Which of the following is an example of matter?
Heat
Light
Air
Fire
- 8. Multiple Choice
The diagram shows the apparatus set-up used to investigate the freezing point of napthalene. Why is conical flask used in this activity?
Conical flask is used to hold the boiling tube
Napthalene is poisonous and needs to be contained
Freezing point can only be determined inside the conical flask
To ensure the cooling process is not affected by surrounding temperature
- 9. Multiple Choice
The diagram shows the structure of carbon atom. How many protons can be found in the nucleus?
4
6
12
10
- 10. Multiple Choice
A liquid of substance X is cooled from 80 C to -2 C. Substance X begins to freeze at 0 C. Which of the following graph represents the cooling curve for substance X?
- 11. Multiple Choice
Element X and Y are two different elements that are located in the same group in the Periodic Table of Elements. Which of the following statements is correct about their atoms?
Atoms of element X and Y have same number of electrons
Atoms of element X and Y have different number of protons
Number of neutrons for atom X and Y changes during formation of an ion
Nucleon number for atom X and Y is the total number of protons and electrons
- 12. Multiple Choice
The table shows the information about atom P. What is the number of neutrons in atom P?
6
7
8
14
- 13. Multiple Choice
The diagram shows the structure of chlorine atom. Which of the following is the correct standard representation for chlorine atom?
- 14. Multiple Choice
The diagram below shows the electron arrangement of the R2+ ion. How many valence electrons are there in an R atom?
2
3
4
8
- 15. Multiple Choice
What is the meaning of Avogadro constant?
The number of particles in one mol of a substance
The mass of one mol of a substance
The pressure of one mol of a substance
The volume occupied by one mol of gas
- 16. Multiple Choice
How many sulphur atoms are there in 322g of X sulphate, XSO4?
[ RAM: O=16, S=32, X=65]
[ Avogadro constant = 6.02 x 10^23]
2.00 x 10^24
2.00 x 10^23
1.204 x 10^24
1.204 x 10^23
- 17. Multiple Choice
What is the mass of carbon in 132g of carbon dioxide?
[RAM: C=12, O=16]
12
24
36
48
- 18. Multiple Choice
Ammonium sulphate, (NH4)2SO4 is an example of a fertiliser. Calculate the percentage of nitrogen in 1 mol of ammonium sulphate.
[RAM: H=1, N=14, O=16, S=32]
12.12%
21.21%
23.23%
31.31%
- 19. Multiple Choice
What is the chemical formula of copper (II) oxide?
Cu2O
CuO2
CuO
Cu2O2
- 20. Multiple Choice
The molecular formula of butene is C4H8. What is the empirical formula of butene?
CH2
CH4
C2H
C2H4
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