ZIMBABWE SCHOOL EXAMINATIONS COUNCIL
**General Certificate of Education Ordinary Level**
**COMBINED SCIENCE**
PAPER 1 Multiple Choice
JUNE 2025 SESSION
Additional materials: Multiple Choice answer sheet Soft clean eraser Soft pencil (type B or HB is recommended) Calculator (optional)
Time: 1 Hour
INSTRUCTIONS TO CANDIDATES
Do not open this booklet until you are told to do so. Write your name, centre number and candidate number on the answer sheet in the spaces provided unless this has already been done for you.
Answer all questions. There are forty questions in this paper. For each question, there are four possible answers, A, B, C and D. Choose the one you consider correct and record your choice in soft pencil on the separate answer sheet.
Read very carefully the instructions on the answer sheet.
INFORMATION FOR CANDIDATES
Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet.
Question 1
Which structure is found in both plant and animal cells?
A chloroplast
B nucleus
C starch grain
D cellulose cell wall
Question 2
Where does the most transpiration take place in a plant?
A cuticle
B root hairs
C stomata
D xylem
Question 3
The diagram shows a sketch of the human alimentary canal. Where does the chemical digestion of proteins begin?
Question 4
What is the function of the gall bladder?
A production of bile
B absorption of fats
C digestion of fats
D storage of bile
Question 5
Which disease is caused by a deficiency of vitamin A?
A scurvy
B rickets
C anaemia
D night blindness
Question 6
The diagram shows a transverse section of a dicotyledonous root.
Which part transports water?
Question 7
Which word equation shows the raw materials and products of photosynthesis?
A glucose + water ⟶ carbon dioxide + water
B carbon dioxide + water ⟶ glucose + oxygen
C glucose + oxygen ⟶ carbon dioxide + water
D carbon dioxide + glucose ⟶ water + oxygen
Question 8
The diagram shows a leaf from a plant kept in the sun for 48 hours.
The leaf was tested for starch using iodine solution. Which colour was observed on the green part?
A green
B white
C brown
D blue-black
Question 9
The diagram shows a food web.
Which organism is a primary consumer?
A vulture
B snake
C hare
D plant
Question 10
In the carbon cycle, which process releases carbon into the atmosphere?
A respiration
B photosynthesis
C lightning
D feeding
Question 11
Which component of blood is responsible for blood clotting?
A plasma
Question 12
The diagram shows a vertical section through the human heart.
Which arrow, A, B, C or D, shows the movement of oxygenated blood from the lungs?
Question 13
In which part of the female reproductive system does fertilisation take place?
A ovary
B uterus
C oviduct
D vagina
Question 14
A farmer planted X seeds and 30% germinated.
What is the value of X if 12 seeds germinated?
A 21
B 40
Question 15
The diagram shows results of a paper chromatography process for four samples of a chemical substance.
Which sample, A, B, C or D, of the chemical substance has two dyes?
Question 16
Element K has an electronic configuration of \(2,8,6\) and element P has an electronic configuration of \(2,8,2\).
Which one is the correct chemical formula of the product of the reaction between K and P?
A KP
B \(K_2P\)
C \(KP_2\)
D \(K_2P_3\)
Question 17
What is the proton number of a sodium atom, \({ }_{11}^{23}Na\)?
A 11
B 12
C 72
Question 18
What is the molecular mass of \(Ca(OH)_2\)? [Ar of Ca = 40.0, Ar of O = 16.0 and Ar of H = 1.0]
A 58.0
B 62.0
C 74.0
D 124.0
Question 19
It took 3 minutes for 5.0 g of copper sulphate granules to completely dissolve in \(50 cm^3\) of cold water.
Which condition decreases the time taken for the copper sulphate to completely dissolve?
A decreasing the volume of the water
B decreasing the temperature of the water
C increasing the temperature of the water
D increasing the size of the copper sulphate granules
Question 20
The table shows pH values of four solutions, A, B, C and D.
Which solution, A, B, C or D, is alkaline?
| solution | pH | | :---: | :---: | | A | 1 | | B | 4 | | C | 7 | | D | 14 |
Question 21
The diagram shows the fractional distillation of liquid air.
Which gas is collected at X?
A oxygen
B nitrogen
C hydrogen
Question 22
Which halogen is used to purify water?
A bromine
B fluorine
C chlorine
D iodine
Question 23
The diagram shows an electrolytic cell.
Which part, A, B, C or D, is the anode?
Question 24
Which one is a raw material used in the blast furnace during the extraction of iron?
A coke
B slag
C cold air
D carbon monoxide
Question 25
Which catalyst is used in the manufacture of sulphuric acid?
A iron
B platinum
C rhodium
D vanadium (V) oxide
Question 26
Which one is a product of the complete combustion of methane, \(CH_4\)?
A oxygen
B carbon soot
C carbon dioxide
D carbon monoxide
Question 27
A gas is produced during the fermentation of glucose.
How is the gas identified?
A it relights a glowing splint
B it changes limewater from clear to milky
C it gives a pop sound with a burning splint
D it changes cobalt chloride paper from blue to pink
Question 28
Which one is a form of potential energy?
A heat energy
B sound energy
C kinetic energy
D chemical energy
Question 29
Which statement on magnetism is correct?
A All metals can be magnetised.
B All non-metals can be magnetised.
C Ferromagnetic materials can be magnetised.
D Any electrical conductor can be magnetised.
Question 30
An irregular stone of mass 80.0 g was lowered into a measuring cylinder containing water. The level of the water in the measuring cylinder rose from 16.0 \(cm^3\) to 20.0 \(cm^3\).
What is the density of the stone?