IMBABWE SCHOOL EXAMINATIONS COUNCIL <br> General Certificate of Education Ordinary Level
**COMBINED SCIENCE** **4003/1** **PAPER 1 Multiple Choice** **1 hour**
**JUNE 2024 SESSION**
Additional materials: Multiple Choice answer sheet Soft clean eraser Soft pencil (type B or HB is recommended) Calculator (Optional)
INSTRUCTIONS TO CANDIDATES
Answer all questions. For each question, there are four possible answers, A, B, C and D. Choose the correct answer. Record your choice in soft pencil on the separate answer sheet provided.
Read very carefully the instructions on the answer sheet.
INFORMATION FOR CANDIDATES
There are forty questions in this paper. Each correct answer will score one mark. Any rough working should be done on this question paper.
Question 1
The diagram shows a palisade cell.
The function of part \(\mathbf{X}\) is to
A trap sunlight.
B maintain the shape of the cell.
C control the activities of the cell.
D allow substances in and out of the cell.
Question 2
The diagram shows a food web.
Which organism is a secondary consumer?
A grass
B goat
C frog
D rabbit
Question 3
Which human characteristic shows discontinuous variation?
A sex
B mass
C height
D foot length
Question 4
During digestion, the enzyme amylase converts
A protein to amino acids.
B starch to glycogen.
C starch to maltose.
D fats to fatty acids and glycerol.
Question 5
Kwashiorkor is a deficiency disease caused by lack of
A fats.
B proteins.
C vitamins.
D carbohydrates.
Question 6
An experiment was set up to investigate a factor of photosynthesis as shown in the diagram.
What is the function of the sodium hydroxide in the experiment?
A to release oxygen
B to absorb oxygen
C to absorb carbon dioxide
D to release carbon dioxide
Question 7
The diagram shows part of the human respiratory system. In which part, \(\mathbf{A}, \mathbf{B}, \mathbf{C}\) or \(\mathbf{D}\), does gaseous exchange take place?
Question 8
Blood capillaries have
A valves.
B very large lumen.
C walls that are one cell thick.
D muscle layers which are very thick.
Question 9
Which component of blood carries hormones around the body?
A plasma
B platelets
C red blood cells
D white blood cells
Question 10
The diagram shows the general structure of a flower.
Which part, A, B, C or D, develops into a fruit after fertilisation?
Question 11
The diagram shows the male reproductive system.
Which part, A, B, C or D, is cut or tied during sterilisation?
Question 12
The diagram shows a process in human reproduction.
Which process is shown?
A ovulation
B menstruation
C implantation
D fertilisation
Question 13
Which disease is caused by bacteria?
A malaria
B bilharzia
C syphilis
D genital herpes
Question 14
Vomiting, diarrhoea and abdominal pains are signs and symptoms of
A scurvy.
B cholera.
C anaemia.
D gonorrhoea.
Question 15
The diagram shows a method of separating dyes.
The method of separation shown in the diagram is
A filtration.
B distillation.
C evaporation.
D chromatography.
Question 16
Which substance is a mixture?
A air
B oxygen
C magnesium
D magnesium oxide
Question 17
One mole of hydrogen and one mole of sodium chloride have the same number of
A neutrons.
B electrons.
C protons.
D particles.
Question 18
An organic compound contains \(84\%\) carbon \((\mathrm{C})\) and \(16\%\) hydrogen \((\mathrm{H})\) by mass.
What is the empirical formula of the organic compound?
[Atomic mass of carbon is 12 and that of hydrogen is 1]
A \(\quad \mathrm{CH}\)
B \(\quad \mathrm{CH}_{2}\)
C \(\quad \mathrm{C}_{12} \mathrm{H}\)
D \(\quad \mathrm{C}_{7} \mathrm{H}_{16}\)
Question 19
Which process is used to manufacture ammonium nitrate fertiliser from ammonia?
A reduction
B distillation
C electrolysis
D neutralisation
Question 20
Lemon juice is considered to be a weak acid.
Which observations, with litmus paper, shows that lemon juice is an acid?
| | blue litmus | red litmus | | :--- | :--- | :--- | | A | remains blue | remains red | | B | turns red | remains red | | C | remains blue | turns blue | | D | bleaches | bleaches |
Question 21
The diagram shows a reaction of dilute hydrochloric acid with substance \(\mathbf{X}\) to produce a magnesium salt.
Substance \(\mathbf{X}\) is
A magnesium.
B magnesium oxide.
C magnesium chloride.
D magnesium hydroxide.
Question 22
The flow diagram shows the stages involved in the separation of the gases in air.
Which gas is collected as a liquid at a temperature of \(-183^{\circ} \mathrm{C}\) by the fractional distillation process?
A hydrogen
B nitrogen
C oxygen
D carbon dioxide
Question 23
The equation shows the production of sulphur trioxide.
\(2 \mathrm{SO}_{2(\mathrm{~g})}+\mathrm{O}_{2(\mathrm{~g})} \rightleftharpoons 2 \mathrm{SO}_{3(\mathrm{~g})} \quad \Delta \mathrm{H}=-98 \mathrm{KJ} / \mathrm{mol}\)
The equation shows that the production of sulphur trioxide is
A an endothermic process.
B a displacement process.
C a reduction process.
D an exothermic process.
Question 24
The diagram shows an experimental set up to investigate conditions necessary for rusting. Which test tube, \(\mathbf{A}, \mathbf{B}, \mathbf{C}\) or \(\mathbf{D}\), will have a rusty nail?
Question 25
Which metal is used to galvanise iron?
A tin
B zinc
C copper
D chromium
Question 26
The diagram shows the preparation of ethanol.
Substance \(\mathbf{Z}\) is
A water.
B glucose solution.
C dilute sulphuric acid.
D calcium carbonate solution.
Question 27
To which homologous series do methane, ethane and propane belong?
A alkanes