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Question 1:-

Topic – B1.1 Characteristics of living organisms

The diagram shows how an aquatic carnivorous bladderwort plant reacts to tiny aquatic organisms that swim by.

Which characteristics of living organisms are shown by this plant?
A excretion and growth
B growth and sensitivity
C nutrition and excretion
D nutrition and sensitivity

▶️Answer/Explanation

Ans : D

Question 2:-

Topic – B3.2 Osmosis

Which description for the process of osmosis is correct?
A Osmosis is the movement of water molecules from a region of high water potential across a fully permeable membrane to a region of lower water potential.
B Osmosis is the movement of water molecules from a region of low water potential across a partially permeable membrane to a region of high water potential.
C Osmosis is the movement of water molecules from a region of high water potential across a partially permeable membrane to a region of lower water potential.
D Osmosis is the movement of water molecules from a region of low water potential across a fully permeable membrane to a region of high water potential.

▶️Answer/Explanation

Ans : C

Question 3:-

Topic – B4.1 Biological molecules

Tests are carried out on a colourless liquid. The results are shown.

Which food groups does the liquid contain?
A protein and fat
B protein and starch
C reducing sugar and fat
D starch and fat

▶️Answer/Explanation

Ans :A

Question 4:-

Topic – B5.1 Enzymes

The graph shows the rate at which 10 g of starch is broken down by amylase at four different temperatures.

At which temperature does amylase work best to break down starch?
A 10 ºC B 25 ºC C 40 ºC D 70 ºC

▶️Answer/Explanation

Ans : C

Question 5:-

Topic – B6.1 Photosynthesis

Why are nitrate ions necessary for plant growth?
A They are essential for producing starch.
B They are found in the chloroplasts.
C They are part of the cell sap.
D They are used in making amino acids.

▶️Answer/Explanation

Ans : D

Question 6:-

Topic- B7.3 Digestion

The diagram shows the human alimentary canal.

In which labelled organs are large insoluble molecules broken down into small soluble molecules?
A P and R B R and S C S and Q D Q and P

▶️Answer/Explanation

Ans : A

Question 7:-

Topic – B9.3 Blood vessels

The arrows in the diagram represent blood vessels.
Which vessel is the pulmonary vein?

▶️Answer/Explanation

Ans : B

Question 8:-

Topic – B12.1 Respiration

What is the word equation for anaerobic respiration in yeast?
A glucose → alcohol + carbon dioxide
B glucose → carbon dioxide + water
C glucose → lactic acid
D glucose + oxygen → carbon dioxide + water

▶️Answer/Explanation

Ans : A

Question 9:-

Topic – B13.1 Coordination and response

Which statement explains how the iris responds to an increase in light intensity?
A The circular muscles contract and radial muscles relax causing the pupil to decrease in size.
B The circular muscles relax and radial muscles contract causing the pupil to decrease in size.
C The circular muscles contract and radial muscles relax causing the pupil to increase in size.
D The circular muscles relax and radial muscles contract causing the pupil to increase in size.

▶️Answer/Explanation

Ans : A

Question 10:-

Topic -B15.2 Sexual reproduction

Which statement about reproduction is correct?
A In asexual reproduction, a diploid offspring is formed after fusion of haploid gametes.
B In asexual reproduction, a haploid offspring is formed after fusion of diploid gametes.
C In sexual reproduction, a diploid offspring is formed after fusion of haploid gametes.
D In sexual reproduction, a haploid offspring is formed after fusion of diploid gametes.

▶️Answer/Explanation

Ans : C

Question 11:-

Topic – C7. Acids, bases, and salts

In one area, two forms of peppered moth exist. One form is pale white with a black and grey pattern. The other form is completely black.
The diagram shows the changes in colour that have occurred in the peppered moth over a period of more than 200 years.

Which row shows what happened?

▶️Answer/Explanation

Ans : D

Question 12:-

Topic – B18.1 Energy flow

The diagram shows the energy flow in part of an ecosystem.

Which group of organisms is X?
A carnivores
B decomposers
C herbivores
D producers

▶️Answer/Explanation

Ans : B

Question 13:-

Topic – B19.1 Habitat destruction

What is the correct sequence of events that occur during eutrophication following an increase of nitrate ions in water?
1 increased aerobic respiration by decomposers
2 death of producers
3 rapid growth of producer organisms
4 death of animals due to lack of oxygen
A 4 → 2 → 3 → 1
B 3 → 2 → 1 → 4
C 3 → 1 → 2 → 4
D 4 → 2 → 1 → 3

▶️Answer/Explanation

Ans : B

Question 14:-

Topic – C7. Acids, bases, and salts

A student adds excess copper oxide powder to warm dilute sulfuric acid.
Aqueous copper sulfate is formed.
Which method is used to remove the unreacted copper oxide?
A chromatography
B crystallisation
C distillation
D filtration

▶️Answer/Explanation

Ans : D

Question 15:-

Topic – C2. Atoms, elements, and compounds

Which diagram represents molecules of a compound?

▶️Answer/Explanation

Ans : B

Question 16:-

Topic – C3. Stoichiometry

Which statements about the mole are correct?

1 One mole of ¹²C contains twice as many atoms as one mole of ²⁴Mg.
2 One mole of ¹²C has a mass of 12 g.
3 One mole of C contains Avogadro’s number of atoms.
4 One mole of oxygen gas at room temperature and pressure occupies 32dm³
.

A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 4

▶️Answer/Explanation

Ans : C

Question 17:-

Topic – C4. Electrochemistry

Dilute aqueous potassium chloride is electrolysed using inert electrodes.
Which substance is produced at the cathode?
A chlorine
B hydrogen
C oxygen
D potassium

▶️Answer/Explanation

Ans : B

Question 18:-

Topic – C5. Chemical energetics

Which process is exothermic?
A boiling water
B cracking a long chain alkane
C decomposition of limestone
D identification of hydrogen using a lighted splint

▶️Answer/Explanation

Ans : D

Question 19:-

Topic – C6. Chemical reactions

Dilute hydrochloric acid reacts with calcium carbonate. The equation for the reaction is shown.

2HCl + CaCO₃ → CaCl ₂ + H₂O + CO₂

The effect of concentration of the acid on the rate of this reaction is investigated.
The volume of gas produced over time is measured for two different concentrations of the acid.
The results for experiments 1 and 2 are shown.

Which row shows the reaction that has the higher rate of reaction and explains why?

▶️Answer/Explanation

Ans : B

Question 20:-

Topic – C6. Chemical reactions

In which equation is the underlined zinc an oxidising agent?
A Zn + Cl ₂ → ZnCl ₂
B Zn + 2H⁺ → Zn²⁺ + H₂
C Zn²⁺ + Mg → Zn + Mg²⁺
D 2Zn + O₂ → 2ZnO

▶️Answer/Explanation

Ans : C

Question 21:-

Topic – C7. Acids, bases, and salts

A student makes lists of acidic oxides and basic oxides.

Which oxides are not in the correct list?
A carbon dioxide and sodium oxide
B potassium oxide and sulfur dioxide
C nitrogen dioxide and sulfur dioxide
D potassium oxide and calcium oxide

▶️Answer/Explanation

Ans : B

Question 22:-

Topic – C8. The Periodic Table

The diagram shows overlapping circles into which different chemical formulae can be placed.

Which formula can be placed in the shaded area because it has all three properties?
A Br₂ B CO C Cu D Na

▶️Answer/Explanation

Ans : C

Question 23:-

Topic – C8. The Periodic Table

Why are the elements in Group VIII of the Periodic Table unreactive?
A They are gaseous elements.
B They are monatomic elements.
C They have full inner shells of electrons.
D They have full outer shells of electrons.

▶️Answer/Explanation

Ans : D

Question 24:-

Topic – C9. Metals

Which metal cannot be extracted from its ore by heating with carbon?
A aluminium
B copper
C iron
D zinc

▶️Answer/Explanation

Ans : A

Question 25:-

Topic – C12. Experimental techniques and chemical analysis

Four watch-glasses contain solid salts as shown.

Water is added to each salt.
Which statement describes the salt solutions that form?
A They are blue or pink only.
B They are white or blue only.
C They are all pink.
D They are all blue.

▶️Answer/Explanation

Ans : A

Question 26:-

Topic – C11. Organic chemistry

Hydrocarbon X has two carbon atoms in each molecule. It does not decolourise bromine water.
Hydrocarbon Y has three carbon atoms in each molecule. It does decolourise bromine water.
What is the difference in the number of hydrogen atoms in the molecules of X and Y?
A 0 B 1 C 2 D 4

▶️Answer/Explanation

Ans : A

Question 27:-

Topic – C11. Organic chemistry

During fermentation, an organic liquid and a colourless gas are produced.
Which row identifies a use for the liquid and describes the result of a test on the colourless gas?

▶️Answer/Explanation

Ans : C

Question 28:-

Topic – P1. Motion, forces, and energy

Which diagram shows the distance–time graph for an object moving with constant speed?

▶️Answer/Explanation

Ans : A

Question 29:-

Topic – P1. Motion, forces, and energy

Four objects with different masses have different forces applied to them, as shown.
Which object has the greatest acceleration?

▶️Answer/Explanation

Ans : B

Question 30:-

Topic – P1. Motion, forces, and energy

Which source of energy is non-renewable?
A chemical energy in a fossil fuel
B energy in tides
C geothermal energy
D wind energy

▶️Answer/Explanation

Ans : A

Question 31:-

Topic – P2. Thermal physics

Some gas is put in a sealed metal container of constant volume.
The gas is now cooled.
What happens to the average speed of the gas molecules, and what happens to the pressure of the gas?

▶️Answer/Explanation

Ans : A

Question 32:-

Topic – P2. Thermal physics

Four liquid-in-glass thermometers are made with different bulb sizes and different tube diameters.
Which thermometer is the most sensitive?

▶️Answer/Explanation

Ans : B

Question 33:-

Topic – P3. Waves

A water wave passes point Y.
A student counts how many wave crests pass point Y in 30 seconds.
Using only this information, what can the student calculate?
A the amplitude of the wave
B the frequency of the wave
C the speed of the wave
D the wavelength of the wave

▶️Answer/Explanation

Ans : B

Question 34:-

Topic – P3. Waves

The diagram shows a ray of light passing from air into a transparent medium.

What is the refractive index of the medium?
A 0.50 B 0.61 C 2.4 D 2.8

▶️Answer/Explanation

Ans : C

Question 35:-

Topic – P3. Waves

The diagram is a displacement–time graph for the molecules in air as a sound wave passes.

The graphs below are drawn to the same scale.
Which graph represents a quieter sound with a higher pitch?

▶️Answer/Explanation

Ans : D

Question 36:-

Topic – P4. Electricity and magnetism

A wire of length l and cross-sectional area X has resistance R.
Which wire has resistance 4R?

▶️Answer/Explanation

Ans : B

Question 37:-

Topic – P4. Electricity and magnetism

There is a current of 3.0A in a resistor. The potential difference across the resistor is 3.0V.
How much electrical energy is transferred to other forms in 3.0 minutes?
A 3.0 J B 9.0 J C 540 J D 1620 J

▶️Answer/Explanation

Ans : D

Question 38:-

Topic – P4. Electricity and magnetism

The current in an electric heater is 10A when in normal use. The heater circuit contains a fuse.
What is the purpose of the fuse and what is a suitable rating for the fuse?

▶️Answer/Explanation

Ans : D

Question 39:-

Topic – P4. Electricity and magnetism

The diagram shows a wire carrying a current. The direction of the current is shown by the arrow.
The wire lies in the magnetic field between two magnetic poles.

What is the direction of the magnetic field and what is the direction of the force on the wire?

▶️Answer/Explanation

Ans : C

Question 40:-

Topic – P5. Nuclear physics

The diagram shows ϒ-rays travelling in the direction shown. They enter a magnetic field that is directed into the page.

In which direction are the ϒ-rays deflected by the magnetic field, if at all?
A They are deflected out of the page.
B They are deflected towards the bottom of the page.
C They are deflected towards the top of the page.
D They are not deflected.

▶️Answer/Explanation

Ans : D

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