cameroon gce O level June 2024 chemistry 1

cameroon gce O level June 2024 chemistry 1

cameroon gce O level June 2024 chemistry 1

entify the change of state from liquid to
gas.
A Sublimation
B Melting
C Evaporation
D Condensation
I. 8
Identify a process in which concentrated
Sulphuric acid is used as a drying agent.
A Adding cone.Il2SO.| to sugar
B Preparation of pure C02 gas
C Adding cone.Il2SO.$ to NaOlI
D Preparation of NH3 gas
Which of the following is true of a 9.
compound?
A The constituents can be separated by
physical means
ft The properties are a sum of the properties
of the constituents
C It cannot be broken down into simpler
substances by any chemical means
D The constituent elements can be separated
by chemical reactions
0
What is the function of Mn02 in the laboratory
preparation of chlorine from potassium
chlorate (KCIO.O?
A Act as an oxidizing agent
B Act as a catalyst
C Act as a reducing agent
D Act as a drying agent ‘
10.
Give an example of an oxide that turns damp
blue litmus paper red.
A CO
j.
B NO
C S02
D ll20
Which of the following oxides is used in the
extraction of metals?
A CuO
B: Al20:>
C Na20
D MgO
I I.
For an element (where P is not the usual
symbol of the element) deduce the number of
neutrons.
A 82
4.
On analysis, an organic compound with
molecular mass SOgmol’1 is made up of 80%
carbon and 20% hydrogen. Determine its
empirical formula.
A CH
B CH2
C C?H6
D C2II,
12
B 27
C 109
D 55
3
Metals conduct electricity because they have
A Free mobile electrons
B Free moving ions
C High melting and boiling point
D Strong force of attraction
5.
13. Which of the following is used as a suitable
drying agent for ammonia?
A Quicklime
B Concentrated Sulphuric acid
C Concentrated hydrochloric acid
D Anhydrous calcium chloride
Atoms of the same element have the same
atomic number and different mass numbers.
This phenomenon is referred to as
A Isotopic abundance
B Isotopy
C Allotropy
D Allotropes
6.
Identify a chemical change in the following
processes.
A Melting of candle
B Boiling of water
C Rusting of iron
D Freezing of water

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