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Question 1:-

Topic – B12.1 (Respiration)

What is meant by respiration?
A protein synthesis
B sweating to lose heat
C the function of lungs
D the release of energy

▶️Answer/Explanation

Ans : D

Question 2:-

Topic- B3.2 (Osmosis)

What is meant by osmosis?
A the net movement of water molecules from a region of higher water potential to a region of lower water potential through a cell wall
B the net movement of water molecules from a region of higher water potential to a region of lower water potential through a partially permeable membrane
C the net movement of water molecules from a region of lower water potential to a region of higher water potential through a cell wall
D the net movement of water molecules from a region of lower water potential to a region of higher water potential through a partially permeable membrane

▶️Answer/Explanation

Ans : B

Question 3:-

Topic – B4.1 (Biological molecules)

Linoleic acid is a fatty acid.
Which larger molecule may contain linoleic acid?
A glycogen
B oil
C protein
D starch

▶️Answer/Explanation

Ans : B

Question 4:-

Topic – B5.1 (Enzymes)

Which row about enzymes is correct?

▶️Answer/Explanation

Ans : C

Question 5:-

Topic – B6.1 (Photosynthesis)

An experiment is set up to investigate the effect of changing the light intensity on the rate of photosynthesis.
The lamp is moved in 10 cm intervals away from the plant and the number of bubbles of gas recorded in 60 seconds.

What will be the result of moving the lamp further away from the beaker containing the plant?
A The number of bubbles of carbon dioxide will decrease.
B The number of bubbles of carbon dioxide will increase.
C The number of bubbles of oxygen will decrease.
D The number of bubbles of oxygen will increase.

▶️Answer/Explanation

Ans : C

Question 6:-

Topic – B7.2 (Digestive system)

Some processes that occur in the alimentary canal and associated organs are listed.
1 absorption
2 assimilation
3 digestion
4 egestion
5 ingestion
Which diagram correctly links each process to the part of the alimentary canal or associated organs?

▶️Answer/Explanation

Ans : D

Question 7:-

Topic – B9.3 (Blood vessels)

What is the sequence of blood vessels that a red blood cell passes through as it travels from the
vena cava to the kidney?
A pulmonary artery → pulmonary vein → aorta → renal artery
B pulmonary artery → pulmonary vein → aorta → renal vein
C pulmonary vein → pulmonary artery →aorta →renal artery
D pulmonary vein → pulmonary artery → aorta → renal vein

▶️Answer/Explanation

Ans : A

Question 8:-

Topic – B12.1 (Respiration)

Which statement about anaerobic respiration is correct?
A It does not cause an oxygen debt.
B It occurs in the muscles during vigorous exercise.
C It uses oxygen to release energy from nutrient molecules.
D It releases more energy per glucose molecule compared to aerobic respiration.

▶️Answer/Explanation

Ans : B

Question 9:-

Topic – B13.1 (Coordination and response)

What is the function of the cornea?
A It carries impulses to the brain.
B It controls how much light enters the pupil.
C It focuses light onto the retina.
D It refracts light.

▶️Answer/Explanation

Ans : D

Question 10:-

Topic – B15.1 (Asexual reproduction)

In a plant, what leads to offspring that are genetically identical to the parent?
A asexual reproduction
B insect pollination
C seed germination
D sexual reproduction

▶️Answer/Explanation

Ans : A

Question 11:-

Topic – B16.1 (Chromosomes and genes)

The diagram shows eggs and sperm containing sex chromosomes.

Which row gives the correct combination of sex chromosomes for a male and female offspring?

▶️Answer/Explanation

Ans : B

Question 12:-

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

The diagram shows a food web.

How many primary consumers, secondary consumers, tertiary consumers and quaternary consumers are present?

▶️Answer/Explanation

Ans : C

Question 13:-

Topic – B19 (Human influences on ecosystems)

What causes eutrophication?
A combustion of fossil fuels
B cutting down of forests
C discarded plastic rubbish
D overuse of nitrogen-containing fertiliser

▶️Answer/Explanation

Ans : D

Question 14:-

Topic – C12 (Experimental techniques and chemical analysis)

An aqueous salt solution contains an insoluble impurity.
Which processes are used to obtain pure salt crystals?
A distillation then crystallisation
B distillation then chromatography
C filtration then crystallisation
D filtration then chromatography

▶️Answer/Explanation

Ans : C

Question 15:-

Topic – C2 (Atoms, elements and compounds)

The element phosphorus burns in air, as shown.
4P + 5O₂→ P₄O₁₀
What does the formula P₄O₁₀ show?
A a mixture of atoms of two elements
B a mixture of molecules of two elements
C a molecule of a compound
D an atom of a compound

▶️Answer/Explanation

Ans : C

Question 16:-

Topic – C2 (Atoms, elements and compounds)

Which row describes an atom that has the nucleon number 24?

▶️Answer/Explanation

Ans : B

Question 17:-

Topic – C3 (Stoichiometry)

Which symbol equation is not balanced?
A C₃H₈ + 5O₂→ 3CO₂ + 4H₂O
B Fe₃O₄ + 2H₂ →3Fe + 2H₂O
C Mg(OH)₂ + 2HCl → MgCl ₂ + 2H₂O
D 2Na + 2H₂O → 2NaOH + H₂

▶️Answer/Explanation

Ans : B

Question 18:-

Topic – C4 (Electrochemistry)

Sodium hydroxide is manufactured by the electrolysis of concentrated aqueous sodium chloride.
During the process, a gas is given off at each electrode and the aqueous sodium hydroxide collects around one of the electrodes.
Which row identifies the gas at each electrode and the electrode around which the aqueous sodium hydroxide collects?

▶️Answer/Explanation

Ans : A

Question 19:-

Topic – C6 (Chemical reactions)

Which row explains why increasing the concentration of a reactant increases the rate of reaction?

▶️Answer/Explanation

Ans : C

Question 20:-

Topic – C7 (Acids, bases and salts)

Which statements about neutralisation are correct?
1 Acids and bases produce water when they neutralise each other.
2 During neutralisation, bases transfer protons to acids.
3 Neutral solutions turn universal indicator green.
4 During neutralisation, acids transfer hydroxide ions to bases.
A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 4

▶️Answer/Explanation

Ans : A

Question 21:-

Topic – C8 (The Periodic Table)

The properties of some substances are listed.
1. form acidic oxides
2. have high melting points
3. act as catalysts
4. form coloured compounds
What are the properties of transition metals?
A 1, 2 and 3 B 1, 2 and 4 C 1, 3 and 4 D 2, 3 and 4

▶️Answer/Explanation

Ans : D

Question 22:-

Topic – C10 (Chemistry of the environment)

Which atmospheric pollutant is removed from air by lime?
A ammonia
B carbon monoxide
C hydrocarbons
D sulfur dioxide

▶️Answer/Explanation

Ans : D

Question 23:-

Topic – C10 (Chemistry of the environment)

Which row describes how hydrogen and nitrogen are obtained for use in the Haber process?

▶️Answer/Explanation

Ans : D

Question 24:-

Topic – C10 (Chemistry of the environment)

Equations representing reactions in the Contact process are listed.
reaction 1 S + O2 → SO₂

reaction 2 2SO₂ + O₂ →←2SO₃
reaction 3 H₂SO₄ + SO₃ → H₂S₂O₇
reaction 4 H₂S₂O₇ + H₂O → 2H₂SO₄
Which row identifies the reactions that use the stated conditions?

▶️Answer/Explanation

Ans : B

Question 25:-

Topic – C9 (Metals)

Which statements about limestone are correct?
1 Its main constituent is calcium oxide.
2 It can be used to manufacture lime.
3 It thermally decomposes to release carbon dioxide.
4 It is used to neutralise alkaline soils.
A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4

▶️Answer/Explanation

Ans : C

Question 26:-

Topic – C11 (Organic chemistry)

Petroleum is separated into fractions by fractional distillation.
Information about uses of some fractions and positions in the fractionating column where they are collected is shown .

Which rows are correct?
A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4

▶️Answer/Explanation

Ans : D

Question 27:-

Topic – C11 (Organic chemistry)

Which structure represents the addition polymer made from the monomer propene, C₃H₆?

▶️Answer/Explanation

Ans : A

Question 28:-

Topic – P1 (Motion, forces and energy)

The diagram shows the speed–time graph for a moving object.

What is the distance travelled by the object in 4.0 s?
A 30 m B 40 m C 50 m D 80 m

▶️Answer/Explanation

Ans : C

Question 29:-

Topic – P1 (Motion, forces and energy)

The diagram shows a triangular sheet of metal with sides of length 50 cm, 40 cm and 30 cm. The sheet is free to move about a pivot at the top corner, as shown.

A cord is attached to the bottom left corner of the sheet and pulled with a horizontal force of 5.0 N to the left.
What is the moment of the 5.0 N force about the pivot?
A 150 Ncm B 200 Ncm C 250 Ncm D 600 Ncm

▶️Answer/Explanation

Ans : B

Question 30:-

Topic – P1 (Motion, forces and energy)

A machine has useful output energy of 1000 J and wasted energy of 300 J.
Which expression is used to calculate the efficiency of the machine?
A \(\frac{300}{1000+300} \times 100\) %
B \(\frac{300}{1000} \times 100\) %
C \(\frac{1000-300}{1000} \times 100\) %
D \(\frac{1000}{1000+300} \times 100\) %

▶️Answer/Explanation

Ans : D

Question 31:-

Topic – P2 (Thermal physics)

Which statement about thermal radiation is correct?
A A dull surface is a good absorber and a good reflector of thermal radiation.
B A dull surface is a poor absorber and a poor reflector of thermal radiation.
C A shiny surface is a good absorber but a poor reflector of thermal radiation.
D A shiny surface is a poor absorber but a good reflector of thermal radiation.

▶️Answer/Explanation

Ans : D

Question 32:-

Topic – P3 (Waves)

A student stands in front of a plane mirror on a wall.
Which statement about the image of the student is not correct?
A The image is laterally inverted (left to right).
B The image is smaller than the student.
C The image is upright.
D The student and the image are equal distances from the mirror.

▶️Answer/Explanation

Ans : B

Question 33:-

Topic – P3 (Waves)

A wave has a frequency of 3.0 MHz and a speed of 1500 m / s.
What is the wavelength of the wave?
A 5.0  10^–4 m B 0.50 m C 500 m D 4500 m

▶️Answer/Explanation

Ans : A

Question 34:-

Topic – P3 (Waves)

The diagram shows a ray of light passing from air into plastic. The sizes of four angles are given.

The table gives the value of the sine of each angle.

What is the refractive index of the plastic?
A 0.62 B 0.92 C 1.6 D 1.7

▶️Answer/Explanation

Ans : C

Question 35:-

Topic – P4 (Electricity and magnetism)

Two insulators are charged by rubbing them with a cloth.
After this, the charged insulators repel each other.
Which statement is a possible description of how the insulators become charged?
A One gained electrons and the other gained protons.
B One gained electrons and the other lost electrons.
C They both lost electrons.
D They both lost protons.

▶️Answer/Explanation

Ans : C

Question 36:-

Topic – P4 (Electricity and magnetism)

A battery of e.m.f. V is connected across a resistor of resistance R. There is a current in the resistor.

Which row shows two changes that both increase the current in the resistor?

▶️Answer/Explanation

Ans : C

Question 37:-

Topic – P4 (Electricity and magnetism)

An electric kettle is connected to a 250V supply. The current in the heating element of the kettle is 10A.
How much electrical energy is transferred in 3.0 minutes?
A 75 J B 4500 J C 7500 J D 450 000J

▶️Answer/Explanation

Ans : D

Question 38:-

Topic – P4 (Electricity and magnetism)

Fuses are used in domestic electric circuits.
Which statement about fuses is correct?
A A fuse is connected in the live wire.
B A fuse is connected in the neutral wire.
C A 3.0A fuse produces a current of exactly 3.0A in the circuit.
D A 3.0A fuse produces a minimum current of 3.0A in the circuit.

▶️Answer/Explanation

Ans : A

Question 39:-

Topic – P5 (Nuclear physics)

A radioactive nucleus \(_{92}^{238}\textrm{U}\) decays into a thorium (Th) nucleus by emitting an alpha-particle.
What is the symbol for the thorium nucleus formed?
A \(_{90}^{234}\textrm{Th}\)

B \(_{92}^{234}\textrm{Th}\)
C \(_{90}^{238}\textrm{Th}\)
D \(_{92}^{238}\textrm{Th}\)

▶️Answer/Explanation

Ans : A

Question 40:-

Topic – P5 (Nuclear physics)

The diagrams show a beam of beta-particles passing into an electric field and another beam of beta-particles passing into a magnetic field.

In which direction is the beam deflected in each case?

▶️Answer/Explanation

Ans : D

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