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Question 1:

Soya seeds contain a lot of protein and are often fed to farm animals.
Which characteristic of living things will benefit from the soya seeds?
(A) excretion
(B) growth
(C) movement
(D) sensitivity

▶️Answer/Explanation

Ans : B

Question 2:

Pieces of potato of the same length were placed in sucrose solutions of different concentrations.
Their length was measured again after two hours.
At which sucrose concentration were the pieces of potato most flaccid?

▶️Answer/Explanation

Ans : D

Question 3:

Four different foods labelled A, B, C and D are tested to find out which nutrients they contain.
Which food contains both starch and protein but no reducing sugar?

▶️Answer/Explanation

Ans :  B

Question 4:

When the phenol molecules in apples are exposed to air, they react with oxygen and the fruit turns brown. This is an enzyme-controlled reaction.
The graph shows the effect of pH on the time taken for pieces of apple to turn brown.

Which statements are correct?
     1   The optimum pH for this enzyme is between 5 and 6.
     2   As the pH increases from 3 to 5, the phenol molecules and the enzyme move faster.
     3   As the pH becomes higher than 6, the shape of the active site changes.

(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 5:

What causes plant leaves to turn yellow?
(A)  a lack of magnesium in the soil
(B)  a lack of starch in the leaves
(C)  a reduction in the rate of photosynthesis
(D)  a reduction in the rate of respiration

▶️Answer/Explanation

Ans :  A

Question 6:

Which component of a balanced diet is needed to prevent constipation?
(A)  carbohydrate
(B)  fat
(C)  protein
(D)  fibre

▶️Answer/Explanation

Ans : D

Question 7:

The diagram shows the life cycle of a plant that takes two years to grow from a seed and produce new seeds.

Which row about the large root in year 1 and in year 2 is correct?

▶️Answer/Explanation

Ans : B

Question 8:

Which equation shows the metabolic process used in bread making?
(A)  carbon dioxide + water → glucose + oxygen
(B)  glucose + oxygen → carbon dioxide + water
(C)  glucose → ethanol + carbon dioxide
(D)  glucose → lactic acid

▶️Answer/Explanation

Ans : C

Question 9:

What are examples of involuntary actions?
  1   widening of the pupil in dim light
  2   increasing the pulse rate during exercise
  3   contracting muscles to pick up a pencil
(A)  1, 2 and 3

(B)  1 and 2 only

(C)  1 and 3 only

(D)  2 and 3 only

▶️Answer/Explanation

Ans : B

Question 10:

The diagram shows a flower.

Which row names the structures labelled P, Q and R?

▶️Answer/Explanation

Ans : A

Question 11:

The boxes show the steps involved in artificial selection of an animal species.

Which sequence of steps is correct?
(A)  2 → 1 → 4 → 3
(B)  2 → 4 → 3 → 1
(C)  4 → 3 → 2 → 1
(D)  4 → 2 →1 → 3

▶️Answer/Explanation

Ans : D

Question 12:

Which statement about all food chains is correct?
(A)  All the carnivores are producers.
(B)  All the consumers are carnivores.
(C)  All the herbivores are consumers.
(D)  All the producers are herbivores.

▶️Answer/Explanation

Ans : C

Question 13:

The release of fertiliser into rivers and lakes causes eutrophication which can lead to the death of fish.
What causes the fish to die?
(A)  Decreased photosynthesis by producers reduces the carbon dioxide.
(B)  Increased photosynthesis by producers reduces the oxygen.
(C)  Increased decomposition reduces the carbon dioxide.
(D)  Increased decomposition reduces the oxygen.

▶️Answer/Explanation

Ans : D

Question 14:

The numbers of protons, neutrons and electrons in four particles are shown.

Which two particles are isotopes of the same element?
(A)   W and X

(B)   W and Y

(C)   X and Y

(D)  Y and Z

▶️Answer/Explanation

Ans : B

Question 15:

A sample of methane has mass 16.0 g at r.t.p. and contains the Avogadro number of molecules.
What is the volume of 4.0 g of methane at r.t.p.?
(A)   4.0 dm3

(B)    6.0 dm3

(C)   16 dm3

(D)   24 dm3

▶️Answer/Explanation

Ans : B

Question 16:

The diagram shows the electrolysis of molten lead(II) bromide using inert electrodes.

Which statement about this experiment is correct?
(A)  Electrode X is positively charged.
(B)  The coloured fumes are produced at the negative electrode.
(C)  The electrolyte is lead(II) bromide.
(D)  The grey solid is lead(II) bromide.

▶️Answer/Explanation

Ans : C

Question 17:

Which energy level diagram shows the activation energy for an exothermic reaction?

▶️Answer/Explanation

Ans : C

Question 18:

The apparatus used to determine the rate of a chemical reaction is shown.

For which reaction is the rate determined using this apparatus?

(A)  CaCO$_{3}$ → CaO + CO$_{2}$
(B)  2C$_{2}$H$_{6}$ + 7O$_{2}$ → 4CO$_{2}$ + 6H$_{2}$O
(C)  MgCO$_{3}$ + 2HCl → MgCl$_{2}$ + CO$_{2}$ + H$_{2}$O
(D)  Cl$_{2}$ + 2NaBr → Br$_{2}$ + 2NaCl

▶️Answer/Explanation

Ans : C

Question 19:

The equation for the reaction between magnesium and zinc sulfate is shown.

Mg + ZnSO$_{4}$ Zn + MgSO$_{4}$

What happens to magnesium in this reaction?
(A)  It is oxidised because it gains electrons.
(B)  It is oxidised because it loses electrons.
(C)  It is reduced because it gains electrons.
(D)  It is reduced because it loses electrons.

▶️Answer/Explanation

Ans : B

Question 20:

Cobalt(II) chloride, cobalt(II) nitrate, and cobalt(II) sulfate are soluble in water.
Cobalt(II) oxide and cobalt(II) carbonate are insoluble in water.
Which method can be used to prepare a sample of solid cobalt(II) sulfate?
(A)  Mix aqueous sodium sulfate and aqueous cobalt(II) nitrate, then filter.
(B)  Mix excess aqueous sulfuric acid and aqueous cobalt(II) chloride, then filter and evaporate the filtrate.
(C)  Mix dilute sulfuric acid and an excess of cobalt(II) oxide, then distil.
(D)  Mix dilute sulfuric acid and an excess of cobalt(II) carbonate, then filter and evaporate the filtrate.

▶️Answer/Explanation

Ans : D

Question 21:

What is warmed with a salt to test for ammonium ions?
(A)  aqueous barium chloride
(B)  aqueous litmus
(C)  aqueous silver nitrate
(D)  aqueous sodium hydroxide

▶️Answer/Explanation

Ans : D

Question 22:

Which statement about the halogens is not correct?
(A)  Bromine is darker in colour than iodine.
(B)  Iodine is solid at room temperature.
(C)  They all have seven electrons in their outer shell.
(D)  They all form diatomic molecules.

▶️Answer/Explanation

Ans : A

Question 23:

Which statement describes a typical transition element?
(A)  It has a high melting point, high density and forms a coloured salt.
(B)  It has a high melting point, low density and forms a white salt.
(C)  It has a low melting point, low density and forms a coloured salt.
(D) It has a low melting point, high density and forms a white salt.

▶️Answer/Explanation

Ans : A

Question 24:

When iron is galvanised, it is coated with a layer of zinc.
Which statements about galvanising are correct?
    1   Zinc has a greater tendency to form positive ions than iron.
   2   Zinc prevents iron from rusting by sacrificial protection.
   3   Iron is more reactive than zinc.
   4   Zinc acts as a barrier method of rust prevention if scratched.
(A)  1 and 2

(B   1 and 4

(C)  2 and 3

(D) 3 and 4

▶️Answer/Explanation

Ans : A

Question 25:

Which three elements do most fertilisers contain?
(A)  Na, C, P

(B)  Na, P, K

(C)  K, C, N

(D)  K, P, N

▶️Answer/Explanation

Ans : D

Question 26:

Which reaction that occurs in the Contact process requires the use of a vanadium(V) oxide catalyst?
(A)  S + O$_{2}$ → SO$_{2}$
(B)  2SO$_{2}$ + O$_{2}$ → 2SO$_{2}$
(C)  SO$_{2}$ + H$_{2}$SO$_{2}$ → H$_{2}$S$_{2}$O$_{7}$
(D)  H$_{2}$S$_{2}$O$_{7}$ + H$_{2}$O → 2H$_{2}$SO$_{7}$

▶️Answer/Explanation

Ans : B

Question 27:

Reactants for three chemical processes are listed.

      1   ethene + steam
      2  ethene + hydrogen
      3  ethene forming poly(ethene)

Which processes form saturated hydrocarbons?

(A)  1, 2 and 3

(B)  1 and 2 only

(C)  1 and 3 only

(D)  2 and 3 only

▶️Answer/Explanation

Ans : D

Question 28:

The diagrams show four solid blocks of equal mass.
Which block is made from the least dense material?

▶️Answer/Explanation

Ans : D

Question 29:

A person uses a bar that is 3.0 m long to lift a rock of weight 900 N off the ground. There is a pivot under the bar at 0.50 m from the rock.
The person pushes vertically downwards on the other end of the bar from the rock, as shown.

Ignore the weight of the bar.
What is the minimum force needed to lift the rock off the ground?
(A)  150N

(B)  180N

(C)  4500N

(D)  5400N

▶️Answer/Explanation

Ans : B

Question 30:

Which energy resource does not have the Sun as its source of energy?
(A)  coal
(B)  geothermal
(C)  hydroelectric
(D)  water waves

▶️Answer/Explanation

Ans : B

Question 31:

A sample of gas is sealed inside a container.
The volume of the container is slowly decreased. The temperature of the gas remains constant.
Which row describes and explains what happens to the pressure of the gas?

▶️Answer/Explanation

Ans : D

Question 32:

There is a vacuum in the space between the Sun and the Earth.
How is thermal energy transferred from the Sun to the Earth?
(A)  by conduction only
(B)  by convection only
(C)  by radiation only
(D)  by convection and radiation

▶️Answer/Explanation

Ans : C

Question 33:

A light wave travelling in air is refracted as it enters a glass block.
Which row shows the effect on the speed and the wavelength of the light wave as it enters the glass?

▶️Answer/Explanation

Ans : A

Question 34:

The diagram shows the formation of an image of an object by a converging lens. Three points are labelled X, Y and Z.

Which labelled point is a principal focus of the lens and which distance is the focal length?

▶️Answer/Explanation

Ans :  A

Question 35:

The current–voltage characteristic for a filament lamp is shown.

As the current increases, what happens to the temperature of the lamp filament and what happens to the resistance of the lamp filament?

As the current increases, what happens to the temperature of the lamp filament and what happens to the resistance of the lamp filament?

▶️Answer/Explanation

Ans : D

Question 36:

A 12Ω resistor is connected in parallel with a 6.0Ω resistor.
What is the combined resistance of the two resistors?
(A)  0.25Ω

(B)  4.0Ω

(C)  9.0Ω

(D)  18Ω

▶️Answer/Explanation

Ans : B

Question 37:

An electric motor is connected to a power supply by insulated wires. The circuit is protected by a fuse, but the wires become hot.

Which change prevents the wires from becoming so hot?
(A)  Connect a second identical fuse in the circuit.
(B)  Use a fuse with a higher current rating.
(C)  Use thicker connecting wires.
(D)  Use thicker insulation on the connecting wires.

▶️Answer/Explanation

Ans : C

Question 38:

Which diagram shows the pattern and the direction of the magnetic field around a straight wire carrying a current into the page?

▶️Answer/Explanation

Ans : A

Question 39:

What is the purpose of the slip rings in an alternating current (a.c.) generator?
(A)  to allow each end of the coil to contact each carbon brush alternately
(B)  to allow each end of the coil to remain in contact with the same carbon brush at all times
(C)  to maintain a constant voltage in the output circuit while the coil is rotating
(D)  to remain stationary while the coil rotates between them

▶️Answer/Explanation

Ans : B

Question 40:

A radioactive source emits beta (β)-particles and gamma ( $\gamma$)-rays.
Both types of radiation enter the magnetic field between the poles of a magnet, as shown.

In which direction does each type of radiation travel after entering the magnetic field?

▶️Answer/Explanation

Ans : D

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