Chemistry 60% Test
Isaiah Thomas Secondary School
Name: ………………………………………………….
Date: …………………………………………………...
Form: 4
Section A: Multiple Choice
Circle one answer from the questions below. Note: If you change any answer erase the first
properly or draw strokes through the previous circle drawn to indicate omission.
1.
a.
b.
c.
d.
Which one of these has a variable shape and is NOT compressible?
Soap
Smoke
Water
Ice
2.
a.
b.
c.
d.
All of the following statements are true EXCEPT:
The boiling point of pure water is 100℃
Only impure substances have a fixed boiling or melting point
Whenever a substance is contaminated, its melting point and boiling points are affected
Evaporation, unlike boiling, does not occur at a particular temperature
3.
a.
b.
c.
d.
Kinetic energy is HIGHEST in:
Solids
Liquids
Gases
Boiling liquids
4. Which of the following provides direct evidence for the particulate theory of nature of
matter?
a. Chromatography
b. Diffusion
c. Distillation
d. Melting
5. Which of the following properties is used in fractional distillation?
a. Density
b. Particle size
c. Solubility
d. Volatility
1
6. Which of the following can be classified as solutions?
I – steel; II – brine; and III - milk
a.
b.
c.
d.
I only
I and II
II only
II and III
7. Parts of the air can be separated by fractional distillation because:
a. Air is a mixture of several gases
b. The gases in the air have different boiling points
c. Nitrogen is a solvent for all other parts of air
d. The parts of air are not in constant composition
8. The sodium ion (Na+ ) has a mass number of 23 and an atomic number of 11. Which two
of the following does the ion contain?
I12 protons
II11 protons
III- 12 neutrons
IV11 neutrons
a.
b.
c.
d.
II and III
I and IV
II and IV
I and III
9. The atoms of element X contain 12 electrons. Which of the following elements is in the
same group of the Periodic Table as element X?
a. Carbon
b. Calcium
c. Chlorine
d. Copper
10. Which of the following metals is a transitional metal?
a. Aluminum
b. Iron
c. Lithium
d. Magnesium
[10 marks]
2
Section B: Structured Questions
Answer ALL of the following questions:
1. Describe the arrangement and movement of particles in each of the three states of
matter. Explain what happens to the particles in a liquid during boiling. [6 marks]
2. Food colouring contain a mixture of water-soluble dyes. Devise a method to separate
the dyes in a sample of food colouring. Explain how this method works. [6 marks]
3. The table shows information about a substance, X.
Melting point
Boiling point
356°C
-39°C
Predict the physical state of substance X at -10°C.
[1 mark]
4. The table shows information about a substance, Y.
Melting point
Boiling point
-218°C
-183°C
Predict the physical state of substance Y at 25°C.
[1 mark]
5. Chemists use a model of an atom that consists of three types of sub-atomic particle.
These are protons, neutrons and electrons.
a. Complete the table below, which shows the properties of these particles.
Particle
Relative Charge
Relative Mass
Electrons
1
Protons
0
Neutrons
[4 marks]
3
b.
Types of atoms and ions vary from each other by the number of sub-atomic
particle found in them. What differences are there between 12C and
14
C?
[1 mark]
c. Define the term 'isotope'.
d.
[1 mark]
Write down the name and the electronic configuration of Cl-. [2 marks]
4