Question 1:
Which processes are examples of excretion?
▶️Answer/Explanation
Ans: B
Question 2:
What are all living organisms made from?
(A) cells
(B) eggs
(C) mesophyll
(D) sperm
▶️Answer/Explanation
Ans: A
Question 3:
Analysis of a large food molecule shows that it contains the elements carbon, hydrogen and oxygen only.
Which food groups could this molecule be from?
(A) carbohydrates and fats only
(B) carbohydrates and proteins only
(C) fats and proteins only
(D) carbohydrates, fats and proteins
▶️Answer/Explanation
Ans: A
Question 4:
The graph shows the mass of product produced by an enzyme-controlled reaction over time when the reaction mixture is placed separately at 37 °C and at 60 °C. The starting concentration of the substrate and the concentration of the enzyme used are kept constant.
What can be concluded from the graph?
(A) At point X on the graph, the enzyme has run out of substrate.
(B) The enzyme denatures at point Y on the graph.
(C) The reaction mixture has a higher kinetic energy at 37 °C.
(D) The reaction mixture has a higher initial rate of reaction when placed at 60 °C.
▶️Answer/Explanation
Ans: D
Question 5:
How many molecules of carbon dioxide are needed to produce six molecules of glucose?
(A) 1 (B) 2 (C) 3 (D) 36
▶️Answer/Explanation
Ans: D
Question 6:
A student investigates the effect of size of gelatine cubes on the rate of digestion by protease. The student places a cube of gelatine with a volume of 8 cm3 into a beaker of protease. The time taken for the cube to be digested is recorded. A second 8 cm3 cube of gelatine is cut up into eight 1 cm3 cubes to represent mechanical digestion and the experiment is repeated.
The results are shown.
Which statements are correct?
1. Cutting up the 8 cm3 cube increases the surface area exposed to the enzyme.
2. Chemical digestion cannot occur unless mechanical digestion also occurs.
3. Mechanical digestion increases the rate of chemical digestion.
(A) 1, 2 and 3 (B) 1 and 2 only (C) 1 and 3 only (D) 2 and 3 only
▶️Answer/Explanation
Ans: C
Question 7:
Which graph shows the effect of humidity on the rate of transpiration?
▶️Answer/Explanation
Ans: C
Question 8:
A student places a mixture of yeast and glucose in a boiling tube, as shown in the diagram. They cover the mixture with a layer of oil. A delivery tube is used to bubble gas produced by the yeast through limewater.
After 10 minutes, the limewater is milky.
Why does the limewater go milky?
(A) The yeast produces carbon dioxide by anaerobic respiration.
(B) The yeast produces lactic acid by anaerobic respiration.
(C) The yeast produces carbon dioxide by photosynthesis.
(D) The yeast produces oxygen by aerobic respiration.
▶️Answer/Explanation
Ans: A
Question 9:
A person touches a hot object and pulls their hand away. This is a reflex action. What is the pathway for the reflex action?
(A) stimulus → motor neurone → relay neurone → sensory neurone →response
(B) stimulus →relay neurone → motor neurone → sensory neurone → response
(C) stimulus → sensory neurone → relay neurone → motor neurone → response
(D) stimulus→ sensory neurone → motor neurone → relay neurone → response
▶️Answer/Explanation
Ans: C
Question 10:
The diagram shows the human male reproductive system.
Which row identifies structures X, Y and Z?
▶️Answer/Explanation
Ans: D
Question 11:
Which row about the nucleus of human cells is correct?
▶️Answer/Explanation
Ans: B
Question 12:
What is an ecosystem?
(A) a chart showing the flow of energy from one organism to another
(B) a diagram giving the energy level of an organism in its environment
(C) a network of interconnected food chains
(D) a unit containing all of the organisms and their environment
▶️Answer/Explanation
Ans: D
Question 13:
Which line shows how the oxygen concentration of the water changes after excess fertiliser has entered a stream?
▶️Answer/Explanation
Ans: B
Question 14:
W, X, Y and Z are diagrams representing atoms and molecules.
Which statement is correct?
(A) W and Z are molecules and X and Y are atoms.
(B) W, X and Z are molecules and Y is an atom.
(C) W, Y and Z are molecules and X is an atom.
(D) X, Y and Z are molecules and W is an atom.
▶️Answer/Explanation
Ans: C
Question 15:
Which row describes the properties of a covalent compound?
▶️Answer/Explanation
Ans: A
Question 16:
The equation for the reaction of sodium with water is shown.
2Na(s) + 2H2O(l) → 2NaOH(aq) + H2(g)
Which mass of sodium produces 30 cm3 of hydrogen?
(A) 0.0288 g (B) 0.0575 g (C) 28.8 g (D) 57.5 g
▶️Answer/Explanation
Ans: B
Question 17:
Aqueous copper(II) sulfate is electrolysed using carbon electrodes. What is the ionic half-equation for the reaction at the cathode?
(A) Cu2+ + 2e– → Cu
(B) 2H+ +2e– → H2
(C) Cu → Cu2+ + 2e–
(D) 4OH– → O2 + 2H2O + 4e–
▶️Answer/Explanation
Ans: A
Question 18:
The energy level diagram for a reaction is shown.
The diagram represents an ……1…… reaction. Heat is ……2…… during this reaction.
Which words complete gaps 1 and 2?
▶️Answer/Explanation
Ans: B
Question 19:
In which equation is the underlined substance acting as an oxidising agent?
(A) AgNO3 + NaCl → AgCl + NaNO3
(B) Cl2 + 2KBr → Br2 + 2KCl
(C) Fe2O3 + 3CO → 2Fe + 3CO2
(D) H2 + PbO → Pb + H2O
▶️Answer/Explanation
Ans: D
Question 20:
Universal indicator solution is added to test-tubes W, X and Y.
What are the colours of the universal indicator?
▶️Answer/Explanation
Ans: D
Question 21:
Copper is a transition element.
Which row shows two properties of copper?
▶️Answer/Explanation
Ans: A
Question 22:
Metal X reacts with aqueous metal Y2+ ions.
The ionic equation for the reaction is shown.
X + Y2+ → X2+ + Y
What are metals X and Y?
▶️Answer/Explanation
Ans: C
Question 23:
Ammonia is displaced from its salts by reaction with substance Z.
Which row identifies substance Z and the test for ammonia?
▶️Answer/Explanation
Ans: C
Question 24:
Four equations are listed.
1. H2S2O7 + H2O → H2SO4 + SO3 + H2O
2. 2S + 3O2 → 2SO3
3. H2SO4 + SO3 → H2S2O7
4. 2SO2 + O2 → 2SO3
Which equations represent reactions that are involved in the Contact process?
(A) 1 and 2 (B) 1 and 3 (C) 2 and 4 (D) 3 and 4
▶️Answer/Explanation
Ans: D
Question 25:
Which substance is produced by the thermal decomposition of limestone?
(A) calcium
(B) calcium carbonate
(C) calcium hydroxide
(D) calcium oxide
▶️Answer/Explanation
Ans: D
Question 26:
A gasoline fraction from the fractional distillation of petroleum includes compounds with the
formulas C6H14 and C12H26.
Which statements about these compounds are correct?
1. C12H26 has a higher boiling point than C6H14 .
2. C12H26 has a lower relative molecular mass than C6H14 .
3. C6H14 and C12H26 are members of different homologous series.
4. C6H14 and C12H26 both undergo complete combustion to form carbon dioxide and water.
(A) 1 and 3 (B) 1 and 4 (C) 2 and 3 (D) 2 and 4
▶️Answer/Explanation
Ans: B
Question 27:
The molecule shown contains some amide linkages,
How many amide linkages are present in this molecule?
(A) 4 (B) 5 (C) 6 (D) 9
▶️Answer/Explanation
Ans: A
Question 28:
A ball is moving at a speed of 3.0 m/s. The ball now accelerates with a constant acceleration of 2.0 m/s2 in the direction that it is moving. What is the speed of the ball 5.0 s after it begins to accelerate?
(A) 10 m/s (B) 13 m/s (C) 17 m/s (D) 30 m/s
▶️Answer/Explanation
Ans: B
Question 29:
What is meant by the moment of a force?
(A) the speed of an object moved by a force
(B) the time taken for a force to move an object
(C) the turning effect of a force
(D) the work done by a force
▶️Answer/Explanation
Ans: C
Question 30:
A paralympic athlete of mass 70 kg uses a wheelchair of mass 10 kg in a race.
What is the kinetic energy of the athlete and wheelchair when they are moving at 6.0 m/s?
(A) 240 J (B) 480 J (C) 1440 J (D) 2880 J
▶️Answer/Explanation
Ans: C
Question 31:
The table shows four sources of energy used to generate electricity.
Which row about the energy source is correct?
▶️Answer/Explanation
Ans: B
Question 32:
Which region of the electromagnetic spectrum is often involved in heat transfer by radiation?
(A) infrared
(B) radio
(C) ultraviolet
(D) X-rays
▶️Answer/Explanation
Ans: A
Question 33:
The diagram shows the direction of a wave that passes a particle. The particle is made to vibrate
by the wave. The direction of vibration of the particle is shown.
Which row states the type of wave that passes the particle and gives an example of this type of wave?
▶️Answer/Explanation
Ans: B
Question 34:
A plane mirror is fixed to a vertical wall and forms an image of an object.
What are the characteristics of the image?
(A) enlarged and upright
(B) enlarged and inverted
(C) same size as the object and upright
(D) same size as the object and inverted
▶️Answer/Explanation
Ans: C
Question 35:
The diagram shows two soft-iron rods JK and LM placed between the poles of two magnets.
Which row shows the poles induced in the soft-iron rods?
▶️Answer/Explanation
Ans: D
Question 36:
The graph shows how the resistance of a thermistor changes with temperature.
There is a potential difference (p.d.) of 6.0V across the thermistor.
What is the current in the thermistor when it is at a temperature of 50 °C?
(A) 0.0020A (B) 0.50A (C) 2.0A (D) 500A
▶️Answer/Explanation
Ans: A
Question 37:
A kettle is connected to a 230V mains supply. The current in the kettle is 10A.
How much energy is transferred in 3.0 minutes?
(A) 12.8 J (B) 767 J (C) 6900 J (D) 414 000J
▶️Answer/Explanation
Ans: D
Question 38:
What is the function of a fuse in a circuit?
(A) It decreases the resistance of the circuit.
(B) It ensures a constant current in the circuit.
(C) It ensures a constant resistance in the circuit.
(D) It prevents the cables from overheating.
▶️Answer/Explanation
Ans: D
Question 39:
What is the purpose of the commutator in a direct current (d.c.) motor?
(A) It reverses the direction of the current in the coil every half turn.
(B) It reverses the direction of rotation of the coil every complete turn.
(C) It reverses the direction of rotation of the coil every half turn.
(D) It reverses the magnetic field due to the permanent magnet every complete turn.
▶️Answer/Explanation
Ans: A
Question 40:
A uranium nucleus decays by emitting an alpha (∝)-particle. The nuclide equation shows this
decay.
\( _{92}^{X}\textrm{U} \to _{234}^{Y}\textrm{Th}\) + ∝-particle
What are the numbers X and Y?
▶️Answer/Explanation
Ans: C