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Question 1:-

Topic – B1.1 (Characteristics of living organisms)

Which term is used to describe the removal of toxic materials from living organisms?
A excretion
B nutrition
C respiration
D secretion

▶️Answer/Explanation

Ans : A

Question 2:-

Topic – B2.1 (Cell structure)

The diagrams show four different cells found in living organisms.

Which cell types have a large surface area for diffusion?
A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4

▶️Answer/Explanation

Ans : B

Question 3:-

Topic – B4.1 (Biological molecules)

Eggs contain fat, protein and water.
Which results are obtained from doing food tests on an egg?

▶️Answer/Explanation

Ans : A

Question 4:-

Topic – B5.1 (Enzymes)

During an enzyme-controlled reaction, the temperature is gradually lowered from the enzyme’s
optimum temperature of 20 ºC to 5 ºC.
Which changes occur as the temperature is lowered?

▶️Answer/Explanation

Ans : A

Question 5:-

Topic – B6.1 (Photosynthesis)

The diagram shows some of the uses in a plant of the initial carbohydrate made by photosynthesis.

Which statement is correct?
A X is a magnesium ion.
B X is iron.
C Y is starch.
D Y is an oil molecule.

▶️Answer/Explanation

Ans : C

Question 6:-

Topic – B7.1 (Diet)

A person is unwell with the following symptoms.
● swollen abdomen (belly)
● red patches on their skin
● loss of muscle mass
What is the likely condition that this person has?
A iron deficiency
B kwashiorkor
C marasmus
D scurvy

▶️Answer/Explanation

Ans : B

Question 7:-

Topic – B8.3 (Transpiration)

Which cells lose water by evaporation from their surfaces during transpiration?
A epidermis cells
B guard cells
C mesophyll cells
D root hair cells

▶️Answer/Explanation

Ans : C

Question 8:-

Topic – B12.1 (Respiration)

Endothermic reactions use up more energy than they release while exothermic reactions release energy overall.
Which row describes the type of reaction that occurs in the process of photosynthesis and in the process of respiration?

▶️Answer/Explanation

Ans : C

Question 9:-

Topic – B13.2 (Hormones)

Which type of chemical is adrenaline?
A enzyme
B hormone
C mineral salt
D vitamin

▶️Answer/Explanation

Ans : B

Question 10:-

Topic – B15.3 (Sexual reproduction in plants)

The diagram shows a section through an insect-pollinated flower.
When pollination occurs, where must the pollen grains reach?

▶️Answer/Explanation

Ans : B

Question 11:-

Topic – B17.2 (Selection)

A student writes down the statement shown.
‘Selective breeding by natural selection is carried out over many generations to improve crop plants and domesticated animals.’
The statement is not correct.
Which change makes the statement correct?
A Change crop plants to flowering plants.
B Change domesticated to wild.
C Change generations to offspring.
D Change natural to artificial.

▶️Answer/Explanation

Ans : D

Question 12:-

Topic – B18.2 (Food chains and food webs)

The diagram shows a marine food web around a kelp (seaweed) forest.

Which organisms are secondary consumers and which organisms are tertiary consumers?

▶️Answer/Explanation

Ans : C

Question 13:-

Topic – B19 (Human influences on ecosystems)

What decreases as a result of eutrophication?
A aerobic respiration by decomposers
B decomposition of dead producers
C dissolved oxygen in the water
D growth of producers

▶️Answer/Explanation

Ans : C

Question 14:-

Topic – C12 (Experimental techniques and chemical analysis)

A mixture of solid sulfur and solid sodium chloride is added to water and stirred.
Sulfur is insoluble in water.
Sodium chloride is soluble in water.
Which processes are used to obtain pure sodium chloride from the mixture?
A distillation then chromatography
B distillation then crystallisation
C filtration then chromatography
D filtration then crystallisation

▶️Answer/Explanation

Ans : D

Question 15:-

Topic – C2 (Atoms, elements and compounds)

An atom of indium has the atomic number 49 and the nucleon number 115.
Which row shows the numbers of protons, neutrons and electrons in this atom?

▶️Answer/Explanation

Ans : A

Question 16:-

Topic – C3 (Stoichiometry)

Pentane, C₅H₁₂, burns in a limited air supply to produce some carbon dioxide and some
carbon monoxide.
What is a balanced equation for this reaction?
A C₅H₁₂ + 7O₂ → 3CO₂ + 2CO + 6H₂O
B C₅H₁₂ + 9O₂ → CO₂ + 4CO + 12H₂O
C C₅H₁₂ + 14O → 3CO₂ + 2CO + 6H₂O
D C₅H₁₂ + 18O → CO₂ + 4CO + 12H₂O

▶️Answer/Explanation

Ans : A

Question 17:-

Topic – C4 (Electrochemistry)

Copper is refined by electrolysis.
Which statements about this process are correct?
1 Aqueous copper(II) sulfate is the electrolyte.
2 Inert anodes are used.
3 Cu²⁺ ions are reduced at the cathode.
4 Pure copper is deposited at the anode.
A 1 and 2 B 1 and 3 C 2 and 4 D 3 and 4

▶️Answer/Explanation

Ans : B

Question 18:-

Topic – C5 (Chemical energetics)

Which statement about chemical reactions is correct?
A Endothermic reactions result in a temperature decrease.
B Endothermic reactions result in a temperature increase.
C Exothermic reactions always produce a large temperature rise.
D Exothermic reactions always produce a small temperature rise.

▶️Answer/Explanation

Ans : A

Question 19:-

Topic – C6 (Chemical reactions)

Which row describes the effect of increasing temperature on the collisions between particles in a chemical reaction?

▶️Answer/Explanation

Ans : D

Question 20:-

Topic – C7 (Acids, bases and salts)

Crystals of copper(II) sulfate, a soluble salt, are made by reacting excess copper(II) oxide with dilute sulfuric acid.
After filtering off the unreacted copper(II) oxide, the solution is heated until it is saturated. It is then left to cool.
Which statements about this preparation are correct?
1 Excess copper(II) oxide is used in order to ensure a high yield is obtained.
2 After filtering, the solution is heated to evaporate some of the water.
3 When the saturated solution cools, crystals of copper(II) sulfate begin to appear.
4 After cooling, the water is rapidly removed by evaporation.
A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 4

▶️Answer/Explanation

Ans : C

Question 21:-

Topic – C8 (The Periodic Table)

The first row of the transition elements is shown.

Which statement about transition elements is not correct?
A They are often used as catalysts.
B They always form colourless compounds.
C They have high densities.
D They have high melting points.

▶️Answer/Explanation

Ans : B

Question 22:-

Topic – C10 (Chemistry of the environment)

Which equation represents a reaction that takes place in the catalytic converter of a car?
A N₂ + 2O₂ → 2NO₂
B 2NO → N2 + O2
C N₂ + 3H₂→ 2NH₃
D 2SO₂ + O₂ → 2SO₃

▶️Answer/Explanation

Ans : B

Question 23:-

Topic – C10 (Chemistry of the environment)

The Haber process is used to make ammonia.
Which statement about the Haber process is not correct?
A A vanadium(V) oxide catalyst is used.
B The nitrogen used is obtained from the air.
C The pressure used is 200 atmospheres.
D The temperature used is 450 ºC.

▶️Answer/Explanation

Ans : A

Question 24:-

Topic – C10 (Chemistry of the environment)

Four different reactions occur in the manufacture of sulfuric acid by the Contact process.
Which substance is a reactant in one of these reactions and a product in another?
A H₂O B O₂ C S D SO₃

▶️Answer/Explanation

Ans : D

Question 25:-

Topic – C9 (Metals)

When limestone is heated, it decomposes.
Which row about limestone and the decomposition is correct?

▶️Answer/Explanation

Ans : B

Question 26:-

Topic – C11 (Organic chemistry)

Which fraction obtained from petroleum is used as a feedstock for making chemicals?
A bitumen
B gasoline
C naphtha
D refinery gas

▶️Answer/Explanation

Ans : C

Question 27:-

Topic – C11 (Organic chemistry)

What is the structure of the addition polymer formed from but-2-ene?

▶️Answer/Explanation

Ans : D

Question 28:-

Topic – P1 (Motion, forces and energy)

The speed–time graph represents the journey of a bicycle.

What is the total distance travelled by the bicycle?
A 1.6 km B 2.0 km C 2.4 km D 3.2 km

▶️Answer/Explanation

Ans : C

Question 29:-

Topic – P1 (Motion, forces and energy)

The diagram shows a cuboid box resting on the ground. The dimensions of the box are shown.

The pressure on the ground due to the weight of the box is 50Pa.
What is the weight of the box?
A 5.0 N B 10 N C 250 N D 500 N

▶️Answer/Explanation

Ans : B

Question 30:-

Topic – P1 (Motion, forces and energy)

Electricity can be generated in different types of power station.
Which statement about geothermal power and nuclear power is correct?
A Geothermal power and nuclear power are both renewable.
B Geothermal power and nuclear power are both non-renewable.
C Geothermal power is renewable but nuclear power is not.
D Nuclear power is renewable but geothermal power is not.

▶️Answer/Explanation

Ans : C

Question 31:-

Topic – P1 (Motion, forces and energy)

What is the definition of efficiency?

A \(\frac{energy \\\ input}{useful \\\ energy \\\ output} \times 100\) %

B \(\frac{energy \\\ input}{wasted \\\ energy} \times 100\) %
C \(\frac{useful \\\ energy \\\ output}{energy \\\ input} \times 100\) %
D \(\frac{wasted \\\ energy}{energy \\\ input} \times 100\) %

▶️Answer/Explanation

Ans : C

Question 32:-

Topic – P2 (Thermal physics)

The diagrams represent the arrangement of molecules in three states of matter. Arrows P and Q represent two changes of state.

Which row identifies the changes of state?

▶️Answer/Explanation

Ans : B

Question 33:-

Topic – P3 (Waves)

A sound wave has a frequency of 16 kHz. The speed of sound is 320 m / s.
What is the wavelength of the wave?
A 0.020 m B 0.050 m C 20 m D 50 m

▶️Answer/Explanation

Ans : A

Question 34:-

Topic – P3 (Waves)

Light passes from air through a solid glass block and back into the air.
Which diagram shows the path of the light?

▶️Answer/Explanation

Ans : A

Question 35:-

Topic – P3 (Waves)

The diagram shows an object at position P in front of a thin converging lens of focal length f. The lens produces a real image of the object.

The object is moved to position Q. The image produced is now virtual.
What happens to the image?
A It changes from a diminished image to an enlarged image.
B It changes from an enlarged image to a diminished image.
C It remains a diminished image.
D It remains an enlarged image.

▶️Answer/Explanation

Ans : D

Question 36:-

Topic – P4 (Electricity and magnetism)

A student measures the current in a resistor and the potential difference (p.d.) across it.
Which circuit shows an ammeter and a voltmeter both connected correctly?