O level south west regional mock gce 2022 chemistry 1

O level south west regional mock gce 2022 chemistry 1

O level south west regional mock gce 2022 chemistry 1

1. Elements are classified into groups based on which
of the following?
A. Number of protons
B. Number of neutrons
C. number of shells
D. number of valence electrons
8. A certain gas, A, dissolve* m
solution which turns blue litmus paper red. Gas A also
turns lime water milky. Gas A is likely to be
A: Chlorine
B: Carbon dioxide
C: Nitrogen dioxide
D: Sulphur dioxide
9. Which of the following is a statement of the kinetic
theory of matter?
A. The particles are in constant motion and possess
energy
B. Liquid generally takes the shapes of containers
C. There are three subatomic particles in all atoms
D. Degree of movement of their matter depend on
particles size
10. Select an element that is stored under paraffin oil
in the laboratory?
A. Mg
B. Na
C. S
D. P
11. Give a reason why chlorine gas is collected by
downward delivery
A. It is heavier than air
B. It easily displaces air
C. It is lighter than air
D. It is insoluble in water
XVi m a
2. Which of the following process is the direct
opposite of melting?
A. Condensation
B. Evaporation
C. Boiling
D. Freezing
t
3. Identify the particles in an atom that is positively
charged and has a mass of 1 unit.
A. Cation
B. Proton
C. Electron
D. Neutrons
4. What is the shape of a water molecule?
A. Linear
B. Planar
C. V-shape
D. Tetrahedral
5. Name the apparatus which is used to measure a
fixed volume of a solution during titration.
A. Burette
B. Measuring cylinder
C. Pipette
D. volumetric flask
12. Select a reaction that is a characteristic of alkene
A. Halogenation
B. Substitution
C. Addition
6. How many neutrons are there in an atom of an D. Esterification
element, P which has a mass number of 37 and an
atomic number of 17?

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